Keychain Gadgets Under $50: Power Banks, Cameras and More Discover keychain gadgets under $50, including the CharmGo Pro power bank, Kodak Charmera camera, Thumby console and Vandlion voice recorder. Keychain gadgets under $50 are turning everyday keyrings into useful tools, with devices that range from backup power to tiny cameras. Online marketplaces such as Amazon offer many options, and as gadgets keep shrinking, surprisingly capable devices can now travel alongside your keys. The four gadgets below each cost less than $50 and are designed to be carried every day, though users need to remember they are attached to the keychain. CharmGo Pro Keychain Power BankThe CharmGo Pro from Rorry is built for moments when a phone, Apple Watch or another gadget is low on power. It has a 10,000mAh battery, which is considerable for a compact, keychain-friendly design.The device includes built-in charging cables for USB-C and Lightning, so no separate cables are needed when leaving home. Its USB-C port can deliver up to 45W of power to compatible devices, and a dedicated Apple Watch charger is built in.On Amazon, the CharmGo Pro holds a 4.3 out of 5 score from more than 650 ratings. It also has a digital display to show remaining charge, and once depleted, it can be recharged in just over two hours with a 30W charger.At $43, there are cheaper 10,000mAh power banks available, but they will not fit on a keychain like this one. At around half a pound, it is likely to be the heaviest item dangling alongside your keys.Kodak Charmera Keychain CameraThe Kodak Charmera is a keychain gadget launched in 2025 and inspired by Kodak's first single-use film camera from 1987. It is designed to bring old-school fun to snapping photos and shooting video.The device weighs just 1 oz and measures about 2.2 inches in length, making it a natural fit for a keychain. Its 1.6-megapixel sensor will not rival a smartphone, but that is part of the appeal: images have a distinctly lo-fi, retro character far removed from the polished output of a pricey handset.It offers built-in filters to add different effects to shots. The $35 Charmera has a 4.5 out of 5 score on Amazon from around 4,000 ratings, uses a microSD card for storage and recharges via USB-C.Kodak sells the camera in blind-box packaging with different designs, another quirky element that turns it into something of a collectible. The Charmera is one of a number of available keychain gadgets aimed at nostalgia and fun.Thumby Programmable Keychain ConsoleThe Thumby from TinyCircuits is a tiny Raspberry Pi-powered programmable computer designed to look like a very small Game Boy console. It comes with five preloaded games: versions of Snake and Pong, along with a shooter, a side-scroller and a dungeon RPG, all playable on its minuscule display.For those into coding, it can be programmed in MicroPython to take it to the next level. Despite its toy-like appearance, there is plenty happening under the hood of this $30.52 device, which appears on Amazon with a 4.5 out of 5 score from over 300 ratings.The Thumby includes six tactile buttons and 2MB of storage to load up your own games, animations and other software experiments. If a friend buys the same device, the consoles can be linked together for multiplayer games such as Pong.Vandlion Keychain Voice RecorderMost phones have a voice recorder, but by the time you grab the phone and fumble with the app, the thing you wanted to record may already be over. Vandlion's device fits on a keychain and is quick to start thanks to its one-touch record button.It even has a mode that starts and stops recording whenever it detects sound. Internal storage of 32GB gives up to 450 hours of recording, and users can choose between MP3 and WAV formats.The recorder has around 25 to 40 hours of battery life and can be recharged via USB-C. The same port is used to transfer recordings to a computer or a compatible phone.That makes this $40 device handy for situations such as recording lectures to listen back to later, documenting discussions in meetings so you do not have to constantly take notes, capturing ambient sound during a vacation, and saving interesting thoughts or ideas that pop into your head throughout the day.