These products are exploding in popularity.
Every once in a while, you’ll come across something on Amazon that’s so cool, it’ll stop you in your tracks. This list is filled with products that are trending, unique, and reviewer-loved. You’ll find things that you’ll wish you knew about sooner and will want to tell everyone that’ll listen about them — after all, they’re popular for a reason. To sweeten the pot, everything on this list is not only cool, but they’re also affordable.
01These cool, fuzzy ball towels that dry hands quickly
These unique fuzzy ball towels will add a stylish touch to your kitchen or bathroom. But, they don’t just look cool, they’re also designed to dry your hands more efficiently than traditional hand towels. Plus, the fuzzy design allows the tiny microfiber strands to get in between your fingers. Reviewers say that they dry quickly and are super absorbent and soft.
02These foot peel masks with over 50,000 5-star ratings
These highly rated foot peel masks are formulated with a blend of fruit acids and extracts to slough away dead skin cells on your feet and transform dry, cracked skin. All you have to do is wear them for 60 minutes, then remove. Over the course of six to 11 days, you’ll see your skin peel right before your eyes to reveal smoother, softer, and healthier-looking feet. They’re available in two sizes and 10 scents like coconut, peach, vanilla, and more.
03An ice cube maker that allows you to dispense ice without touching it
Flimsy ice cube trays that leak when you try to transfer them to the freezer are a thing of the past. This compact ice maker allows you to make ice without spilling water. Just fill with water and freeze. When it’s frozen, easily dispense ice without having to touch it so it’s more sanitary. Push down on the bottle until it’s flexible, pull the straps on the sides to release the cubes, shake, and serve. It makes 54 ice cubes in about eight hours.
04This microwave pasta maker that cooks pasta in less than 15 minutes
When I need to whip up a quick meal, pasta always comes to mind. This pasta maker makes it even easier and quicker to make spaghetti — no need to boil water or babysit a pot. All you have to do is add your pasta of choice, add water to the fill line, then microwave for 12 to 13 minutes. Then, place the lid on to drain. It even has holes at the top of the lid to help you measure serving sizes so you don’t have to guess how much pasta to cook.
05These battery-operated candles with realistic flickering flames
If you want to create a cozy vibe, these battery-operated candles will be the perfect addition to any space like your vanity, coffee table, or side tables. You won’t have to worry about open flames, blowing them out, or smoke and soot. Even though they aren’t real, they’re made with real wax and flicker like regular candles. Use the included remote to turn them on or off, adjust the brightness, and set an auto-off timer.
06An adhesive remover that gets rid of sticky residue
Removing stickers, decals, price tags, or similar things can be really tough. Skip scrubbing until your arms hurt with this adhesive remover. It’s tough on messes yet safe to use on multiple surfaces and fabrics like carpets, clothing, glass, tile, and wood. It can be used to remove glue, gum, tape residue, tar, and so much more. Multiple reviewers said it works like a charm. With over 20,000 five-star ratings, it’s a product you’ll be so glad to have on hand when you find yourself in a sticky situation.
07A set of window track cleaners that a reviewer said left them “flabbergasted”
This window track cleaning set includes everything you’ll need to quickly and easily clean every nook and cranny — and one reviewer was “flabbergasted” at how well it works. It comes with three tools that clamp the included sponges to help them get into small areas to remove dust, dirt, and debris. It has a tiny brush and dustpan so you can sweep and scoop away loose particles. This set can also be used to clean vents and areas with small gaps.
08A door draft stopper that helps reduce your electricity bill
This door draft stopper will prevent heat from escaping during winter and keep cool air in during the summer — saving you money on utilities. It closes the gap under doors up to 1 inch and it’s easy to install; just apply with the included peel-and-stick adhesive. It can also be used to reduce noise thanks to the zigzag internal structure. Reviewers are impressed by how effective it is at blocking drafts and reducing noise, which is why it’s racked up over 28,000 five-star ratings.
09A deeply hydrating foot cream that locks in moisture for 24 hours
Infused with hydrating and soothing ingredients like urea, beeswax, lactic acid, and peppermint oil, this foot cream promises to soothe and restore even the most dry, cracked feet out there. The unique formula even has Epsom salt to offer relief from light pains, making this a standout powerful lotion.
10This car cup adapter that expands to hold larger bottles & cups
Nothing is worse than realizing your new emotional support water bottle is too big to fit in your car’s cup holder. This car cup adapter allows you to fit most 18- to 40-ounce bottles, even ones with handles. All you have to do is twist the top to expand or retract the base to fit your cup holder. It also has special tabs that allow you to remove your cup without pulling out the holder. The coolest part? It won’t block your other cup holder and two adapters can fit side-by-side.
11A popular & portable mini humidifier with a night-light
This humidifier is about the size of a cup, making it great for small spaces and it’s easy to move around so you can moisturize the air just about anywhere — even in your car’s cup holder. Don’t let its size fool you — it can hold 250 milliliters of water and run up to eight hours. Plus, it has two mist modes, auto shut-off, and doubles as a night-light. It’s also super quiet so it won’t disturb you. With over 15,000 five-star ratings, it proves that size doesn’t always matter.
12This highly rated strap that helps you stretch deeper
This strap is designed with 10 individual loops to help you perform unassisted stretches based on your level. It’s backed by over 20,000 five-star ratings and has 4.7 stars overall. And, unlike similar straps, it’s made of durable nylon that will not tear easily. It also includes a book with over 30 stretches and access to an app that features various stretching routines.
13An adjustable reading light that lasts 80 hours on 1 charge
This rechargeable book light is easy to clip onto books and features an adjustable light head that can rotate in various directions so you can get the right angle. It has five brightness levels, and the LED beads are designed to evenly distribute light onto pages. It also has three color modes, one of which is an amber mode that filters 99.9% of blue light, which can help protect your eyes and reduce eye strain. Need more proof that this is a cool book light? It has a near-perfect 4.8-star rating and nearly 10,000 five-star reviews on Amazon.
14This cult-fave stain remover that even works on old messes
This stain remover is formulated without perfume, dyes, peroxide, chlorine bleach, and phosphates. Plus, it’s 100% biodegradable. It comes in a convenient spray bottle so you can spritz stains easily. It can be used on clothes, carpet, upholstery, and more. Not only is it great for removing fresh stains, but it’s powerful enough to remove set-in stains. Don’t believe the hype? It’s backed by over 37,000 five-star ratings and a bunch of reviewers said it works like magic.
15A tool that makes it easier to clasp bracelets
If you have ever tried to fasten a bracelet on your own, you know the struggle. This tool is designed to make it easier to clasp jewelry without it slipping and sliding out of your grip. It allows you to hold bracelets in place and snap them shut without damaging them. This also works for necklaces, watches, and zippers. Quite a few reviewers said they wish they purchased this sooner.
16This popular eye roller serum with caffeine
This eye serum is designed with a 360-degree stainless steel roller-ball applicator that provides a cooling effect while massaging under your eyes. The applicator is also designed to allow fast absorption, and it’s less messy than sticking your finger in a jar of eye cream. It’s formulated with ingredients like caffeine and hyaluronic acid to brighten, smooth, and moisturize your skin, tricking everyone into thinking that you got a good night’s sleep — even if you didn’t.
17These flower-shaped gel stamps that clean your toilet with every flush
These gel stamps are easy to apply inside your toilet without having to touch your bowl. They include an applicator tool that you just press to release one. These flowers are not only bright and colorful, they also prevent stain build-up and limescale with every flush. Plus, they refresh your bathroom with an aromatic scent. The best part? You don’t have to remove them — each one lasts up to two weeks and dissolves.
18This veggie chopper that slices & dices food fast
This chopper will make it easier and faster to slice, dice, and even spiralize veggies without the hassle. Not only does it get the job done quickly, it also protects your hands from sharp blades — all you have to do is press down to chop. It even includes a finger guard to use while spiraling veggies. Plus, it catches everything in a tray, so it’s easy to transfer ingredients to your pot. It has over 85,000 five-star ratings, and one reviewer said it’s “a must-have for your kitchen.”
19A shoe cleaner & brush set with over 24,000 5-star ratings
This shoe cleaner and brush kit is formulated to clean all washable leathers, vinyl, nubuck, suede, canvas, and cloth shoes. One reviewer wrote, “This is the best sneaker cleaner I have ever used.” And, since the cleaner is a concentrate, a little goes a long way — one bottle can last years. This set comes with everything you’ll need to transform your dirty sneakers, boots, and more so they’ll look as good as the day you bought them.
20This under-$10 glue gun that heats up in just 1 minute
Great for quick fixes and crafts, this glue gun warms glue in just 60 seconds. It features an anti-drip nozzle that allows you to adhere glue precisely where you need it without it leaking. It also has a stand that keeps the hot nozzle elevated to protect surfaces. Plus, it includes 30 glue sticks, so it’s ready to go right out of the box.
21This salad spinner that doubles as a strainer & serving bowl
If you rinse your lettuce in a colander, you’re often left with wilted greens that are soaking wet. This salad spinner allows you to not only wash your salad but also dry it. With a spinning motion, it drains water and leaves your produce dry and clean. Plus, it features a non-skid base that keeps the bowl in place while you turn the knob to spin, a button that you can press to instantly stop it, and a drain on the lid so you can tilt to remove water. The interior basket is removable for a strainer, and you can use the clear bowl as a serving vessel.
22These highly rated gloves to moisturize dry hands in just 10 minutes
Reviewers said they experienced results with just one use of these hand mask gloves. These are infused with shea butter and prebiotic oats that soothe, soften, nourish, and moisturize dry skin. All you have to do is slip them on your hands and wear them for 10 minutes — no rinsing required. By the way, they’re free of parabens and fragrances and formulated to be gentle enough for sensitive skin.
23This soft & shaggy throw blanket with over 21,000 5-star ratings
Reviewers highly recommend this blanket because it’s soft, warm, and washes well. Plus, it feels more expensive than it actually is — proving you don’t always have to splurge to have a luxurious experience. What makes this blanket even cooler besides the raving reviews and affordable price point? It’s double-sided with shaggy plush on one side and soft sherpa on the other so you can simply flip it over to suit your needs or to switch up your style.
24This straw with a filter so you can brew tea & coffee anywhere
This cool straw is designed with a filter at the bottom that keeps out particulates while you sip. Brew coffee or tea on the go so you can have a hot, fresh cup of your fave beverage at work, while camping, or on the road without special equipment. It features a silicone tip for comfort and temperature diffusion. It can also be used for juices and muddled cocktails to keep out pulp and seeds. The filter is removable and dishwasher-safe for easy cleaning.
25These exercise sliders with over 7,000 5-star ratings
These discs can easily glide on any surface like tile, hardwood floors, and even carpet so you can have a full body workout without the need for bulky, expensive equipment. Use them for your hands or feet so you can slide to perform strengthening and toning exercises like mountain climbers, lunges, and more. Reviewers appreciate that they’re easy to use, don’t scratch floors, and are small enough to take just about anywhere.
26A pack of balms made with beeswax that moisturizes lips & cuticles
Made with organic beeswax, natural oils, and essential oils, these balms are great for hydrating lips and can even be used on cuticles. They’re designed to seal in moisture to repair dry, chapped skin. One reviewer wrote, “This is the best natural lip balm I have ever used.” It includes a variety of flavors like vanilla, blackberry, and lime.
27This cube power strip with 3 outlets & 3 USB ports
Ideal for travel, this cube outlet only occupies one socket while providing three outlets and three USB ports. The USB ports automatically detect devices to deliver optimal charging speeds. Use it in hotels, dorms, or any space that doesn’t have enough sockets. It’s also designed without surge protection, making it safe to use on cruise ships, since most only allow non-surge power strips.
28This glass foot file that’s gentle on feet as it buffs away dry skin
This glass foot file can be used on wet or dry feet to scrub and exfoliate your skin. It buffs away dead, dry skin and callouses to reveal smoother, softer feet. And, unlike metal foot files and rasps, it’s gentler on skin and is designed to not scratch or cut your feet. Plus, it’s easy to clean — just rinse under water and allow it to air dry.
29A 2-pack of pouches that help your soap bars last longer
Designed to fit most soap bars, these soap pouches help bars lather and foam quickly and more effectively. Plus, they help you use every drop of soap because it keeps small pieces together. You can even combine leftover soap pieces in the pouch so that nothing goes to waste. The coolest feature? This pack contains one soft pouch and one rough pouch so you can get the right level of exfoliation for your needs.
30This budget-friendly tumbler with a near-perfect rating
This tumbler looks very similar to another name-brand tumbler that’s taken over the internet. With its minimalist design and color-matched straw, it has quickly become a favorite with 4.8 stars after 24,000 ratings. Featuring a leak-resistant lid and ergonomic handle, this tumbler hits all the marks — and fits well in cupholders too. Reviewers appreciate that it’s actually leakproof and doesn’t spill even if you tip it over. Plus, it’s dishwasher-safe.
31These cable holders that tidy unruly wires
These cable holders can be used in a variety of ways to declutter and organize cords. Lay them flat to keep wires in place, or use their hook-and-loop feature to secure them to appliances and wrap cords neatly on them. Use the included adhesive to stick them onto appliances if desired. They can also be cut so you can customize the size to fit your needs.
32This 3-pack of exercise bands in light, medium, & strong resistance levels
With over 25,000 five-star ratings, these resistance bands are gaining popularity on Amazon quickly. Reviewers say they’re well-made and, unlike similar bands, they stay put and don’t ride up thanks to the nonslip cloth material. This set includes three bands with different resistance levels so you can advance from beginner to pro at your own pace. They’re great for squats, hip thrusts, and full-body workouts.
33This handheld milk frother that creates foamy tops for hot drinks
This milk frother makes it simple to create foamy tops on hot beverages within seconds — no need to make a trip to the coffee shop for a fancy cup of coffee. I have a milk frother and I use it daily to create foam for hot chocolates, coffees, cappuccinos, and more. You can use any milk or creamer of your choice. It can also be used to mix protein shakes or other ingredients into beverages. It’s battery-operated, so you don’t have to worry about an annoying cord getting in your way. Plus, it includes a stand so you can easily store it on your countertop.
34These metallic marker pens that dry quickly
These metallic marker pens are vivid and bold. They can be used on a bunch of surfaces and for various crafts. Use them to doodle and draw on cardboard, stone, wood, plastic, glass, ceramics, metal, and more. They’ll even show on dark surfaces like black paper. Unlike similar marker pens, you don’t have to shake these before using them. What makes them even cooler? They’re fade-proof, waterproof, and they dry quickly.
35A mess-free pancake batter bottle that comes with a blender ball
Skip mixing bowls, measuring cups, and whisks with this all-in-one pancake batter bottle that you’ll wish you purchased sooner. You can measure, mix, and pour from the same container. It includes a stainless steel blender ball and features a wide opening that makes it easy to add ingredients. Reviewers called it a game-changer because it makes mixing and dispensing batter easier — it’s no wonder it has over 13,000 five-star ratings.
36This portable sound machine with 6 soothing sounds
This sound machine has over 22,000 five-star ratings — and, since I own one, I can see why. It’s small enough to fit in any space or to travel with. You can plug it in or use batteries, making it versatile and adaptable to your needs. Plus, unlike other sound machines, it doesn’t just have white noise as an option; it also has rain, brook, thunder, ocean, and summer night sounds. You can also adjust the volume. Use the optional timer to turn off the sound machine after 30, 60, or 120 minutes. I’ve been using it every night for years because I’m a light sleeper, and it drowns out noises so I can sleep better.
37An easy-to-clean drain protector that prevents clogs
Cleaning your drain is important if you want to prevent it from getting clogged. But, it can be difficult and gross — until now. This drain protector is easy to install; just insert it into your drain. It’s designed for hair to wrap neatly around it so that it’s easy to clean. All you have to do is lift the drain protector and wipe. Then, place it back in your drain. The best part? It won’t disrupt the flow of water. It has over 14,000 five-star ratings because it’s easy to use, it really works, and it blends in with your drain and doesn’t stand out like a sore thumb.
38This pet hair brush with over 68,000 5-star ratings
This brush can be used on cats and dogs with short or long hair. It’s designed with round bristles that won’t bend, break, or scratch your pet’s skin. The fine, angled bristles also make it effective at detangling fur and removing loose hair, dirt, and debris. Retractable bristles allow you to clean off fur easily. All you have to do is press a button, then wipe it all away. It’ll reduce shedding, remove knots, and help your pet’s coat look healthier.
39A small selfie ring light with 3 color modes & 10 intensity levels
Small enough to clip onto your tablet, phone, or laptop, this selfie ring light can brighten your screen so you’ll appear brighter and better lit while you’re in a Zoom meeting, recording a video, or making a TikTok. Since it’s compact, it’s also easy to travel with so you can get the perfect selfies anywhere. It has three color modes: sunkissed warm, natural daylight, and pearly white. Plus, it has 10 intensity levels that you can dim or brighten to adjust to your liking.
40These glass oil & vinegar dispensers with marked measurements
These glass oil and vinegar dispensers will look great on your counter. They’re not just gorgeous, they’re also practical. Designed with a wide mouth, they’re easy to clean and refill with spouts that allow oils to pour smoothly. Measurement markers on the sides of each bottle help you to be precise with your ingredients when cooking. They also include filters that you can add to the spouts to keep spices out while pouring.
41This dual-sided body brush that cleans & exfoliates hard-to-reach areas
This body brush has two sides — one with stiff bristles and another with soft bristles. The soft side is designed to clean and wash your skin, while the stiff bristles are perfect for dry brushing and exfoliating your skin. This brush features a long handle with nonslip grips so you can reach tough areas like your back and legs. One reviewer said it’s “worth every penny” and their “skin has never been this soft” since using this brush.
42This multipurpose cutter & scraper tool with over 26,000 5-star reviews
This kitchen tool can be used in a variety of ways. Use it to slice and chop veggies, fruit, pizza, and more; it can also make it easier to scrape foods like dough off of surfaces. It has measurements to make it convenient to cut foods in precise sizes. It has a near-perfect rating of 4.8 stars because it’s one of those products you never knew you needed but will be so glad you purchased.
43A touchless thermometer that reads temperatures in just 1 second
This thermometer doesn’t require contact to get a temperature reading — it uses a sensor. All you have to do is hover it over the middle of your forehead and press a button. It will beep when it’s ready for you to read the results. There’s also a silent mode if you don’t want the sound to disturb anyone. It can store up to 35 readings so you can look back if you need to. Use it also to check the temps of food, objects, and rooms.
44A juicer with auto-reversing cones that maximizes juice extraction
Designed with juicing cones that are pressure-activated and auto-reversing, this juicer maximizes extraction so you’ll get every last drop of juice out of fruits. It features a pulp strainer that you can adjust to add as little or as much pulp to your juice as you’d like. Plus, it doubles as a pitcher. The removable parts are dishwasher safe, and its space-saving design barely takes up room on your counter.
45These super stretchy leggings that are soft & not see-through
I own several pairs of these leggings, and I tell everyone I can about them. They’re so stretchy that they’ve quickly become my go-to pair of leggings because they never let me down. They also feel really soft, they’re not see-through, and they don’t pill when I wash them. Trust me, after getting one pair, you’ll want to order more in every color — they’re worth the hype.
46This popcorn maker with a tray to melt butter
This popcorn maker barely takes up room on your counter, but don’t let its compact size fool you — it can make up to 16 cups of popcorn. You don’t have to use oil because it uses air to pop kernels. An included measuring cup doubles as a butter melting tray so you can melt butter while it makes popcorn. It also comes with a recipe guide filled with inspiration to create different kinds of flavored popcorn. It’s a reviewer-fave with over 17,000 five-star ratings.
47A satin pillowcase that stays cool & is gentle on your skin & hair
If you’re a hot sleeper, you’ll love this satin pillowcase because it’s breathable and stays cool. Satin is also great for your hair and skin because its smooth surface reduces friction. It helps prevent your hair from getting frizzy and reduces breakage. And, since it doesn’t absorb your skin’s natural oils, it will help your skin retain its moisture.
48This hair wax stick that slicks down flyaways & has reviewers obsessed
Infused with beeswax, avocado oil, vitamin E, and caster oil, this hair wax stick is designed to smooth hair and reduce frizz. It comes in a convenient stick that allows you to apply it directly to your hair. Great for smoothing flyaways, it leaves buns, ponytails, and other hairstyles looking sleek and shiny. It doesn’t leave behind residue and won’t make your hair feel hard like some other products might.
49A pack of toothpaste caps that prevents messes
You’ll wonder how you lived without these toothpaste caps for so long. They put an end to toothpaste messes because they dispense the perfect amount of paste, and they’re self-sealing to prevent paste from getting all over your sink and build-up accumulating around caps. Reviewers said they’re easy to use, they really work, and they help prevent wasting toothpaste.
50This sleek outlet concealer that lets you push furniture closer to walls
This ultra-thin outlet concealer is designed to hug walls so it blends in for a sleek look and lets you keep furniture closer to your walls. It also includes an adhesive cord concealer kit to neatly and discreetly secure it to an outlet. Reviewers called it the perfect solution to deal with unsightly cables and bulky cords behind furniture.
51This magnetic mini box cutter that you can store on your fridge door
This small box cutter makes it easier to open boxes and tricky packaging in no time. It’s made of extremely hard ceramic thats stay sharp for smooth cuts and has a finger-friendly edge to protect your fingers. It also has an auto-retractable blade to help prevent injuries from slips. It features a keyhole and magnet so you can store it on a hook, on your key chain, or your fridge so you’ll always have it handy when you need it.
52A soothing eye mask that can be used hot or cold
When heated in the microwave, this eye mask can be used as a compress to alleviate issues like dry eyes and eye fatigue. It can also be frozen to reduce puffiness, swelling, and headaches. Some Amazon customers said it’s even great to help with allergy symptoms like sinus pain. Whether you’re using it for pain relief or as a soothing sleep mask, the adjustable head strap allows for optimal comfort. It also comes with a storage bag that makes it easy to travel with.
53These flexible hair rollers that reviewers say are comfortable to sleep in
With over 27,000 five-star ratings, reviewers are fans of these flexible hair rollers because they’re a heatless way to easily curl your hair and they’re comfortable to sleep in. This set includes 42 rollers in six different thickness types, and they work well for curling short, medium, and long hair. You can apply them to wet or dry hair — and they grip your hair without causing damage.
54This comfy knit beanie with over 135,000 5-star ratings
This beanie has a near-perfect rating of 4.8 stars on Amazon. It’s popular among reviewers because it’s durable, fits well, and is comfortable and well-made. Plenty of shoppers mentioned they were so impressed by it, they purchased more than just one. The rib knit material keeps your head warm without feeling scratchy, and you can adjust the cuff to fit over your ears to keep them toasty.
55A shave kit with refills & a magnetic holder
Designed with sensitive skin in mind, this shave kit includes four five-blade razors surrounded by aloe vera soap to reduce irritation associated with shaving. It features a nonslip, ergonomic handle and a pivoting head for easy handling and a closer shave. Plus, this set also includes a magnetic holder that’s quick and easy to install on your shower wall.
56These car headrest hooks that prevent purses & bags from tumbling over
Instead of placing your purse or shopping bags on the floor or seats, these headrest hooks allow you to hang them on the back of headrests instead. They’ll save you precious legroom while also preventing your items from tumbling out when you make a sudden stop or turn. They’re easy to install, and they can be flipped around to adjust the placement for front and backseat passengers.
57These motion-activated night-lights with 2 brightness levels
This two-pack of motion sensor night-lights has three settings and two brightness levels. They can be set to stay on all day, stay off until you need them, or automatically turn on when they sense motion. You can also adjust between two brightness levels for dimmer or brighter lighting. The night-light’s design won’t block the second outlet, and they’re energy efficient. If you want a more colorful option, they’re available in fun colors like blue, purple, green, and more.
58A reviewer-loved nail strengthening cream that helps prevent chipping
This nail cream has garnered over 46,000 five-star ratings, and reviewers called it a game-changer for nails and cuticles. Some have even said it’s great to repair damage caused by acrylic nails. Infused with ingredients like coconut oil, shea butter, and calcium, this nail cream is formulated to strengthen thin, brittle nails and promote growth. It also prevents chipping by making nails harder and thicker while conditioning cuticles.
59This waterproof rubber mat that stores shoes & contains messes
This durable rubber mat is waterproof and will prevent dirty shoes and wet rain boots from messing up your floors. It’s designed with a lip to keep water, mud, and dirt contained. Use it also to store cleaning products, or to place under potted plants and pet bowls to catch spills and messes. Reviewers noted that it’s sturdy, easy to clean, and stays in place.
60This double-sided hand warmer with 3 heat settings
This portable hand warmer is small enough to fit in your pocket, yet powerful enough to heat up to 131 degrees Fahrenheit in seconds. It features three settings so you can get the right temperature range for you to warm up your hands. You’ll be happy to have this during colder months for outdoor sporting events, camping, or while walking your dog in frigid temps. It’s rechargeable and can even work as a power bank for your smartphone.