In a world where losing your wallet is a rite of passage, ZDNET has swooped in with an exclusive deal on KeySmart SmartCard Bluetooth trackers, offering a 20% discount from Aug. 1-31 at Amazon with the code ZDNET20OFF. Yes, you read that right - there's a code, and it's exclusive to ZDNET readers, because apparently, we're the only ones who deserve to keep tabs on our stuff.

This deal covers the latest SmartCard (Gen 3) and its Ghost model, which is basically the see-through version that lets you admire the tech inside while it's busy not losing your wallet. Prices start at $36 for a single card (save $9), $77 for a 3-pack (save $19), and $120 for a 5-pack (save $30). That's a saving of up to $30, which is almost enough to buy a decent lunch, or at least a few coffees while you frantically search for your misplaced keys.

These ultra-thin, rechargeable cards are the unsung heroes of the tracking world, slipping into wallets, purses, and pockets without the bulk of an AirTag. They're compatible with both Apple and Android devices, so no one gets left behind in the great tracker wars. ZDNET's own Matthew Miller and Adrain Kingsley-Hughes have been singing their praises for years, and they've tested every iteration, including the Gen 3.

Matthew Miller, who clearly has a thing for rechargeable gadgets, notes that the battery lasts about 11 months before needing a top-up. And here's the kicker: it charges wirelessly. Miller says, "The SmartCard charges up wirelessly, so you can just set it down on your wireless charger to top it off. I like that I can use my Samsung Galaxy Z Fold 7 with reverse wireless charging to power up the card." So you can charge your tracker with your phone, which is either a marvel of modern technology or a sign that we're one step away from our phones charging our wallets. Probably both.

In his review, Miller describes the card as looking like "a plain black credit card with some white-colored labeling," but don't let its boring exterior fool you - it's got a loud chime and can send left-behind notifications if you bother to enable them. The Ghost model, meanwhile, offers a white-grey translucent look that lets you see the internals, because who doesn't want to examine the guts of their tracker while waiting for their luggage?

This deal is a rare unicorn in the deals world: KeySmart SmartCards rarely go on sale, and you can't get this discount anywhere else. That's why ZDNET has slapped a 5/5 Editors' Deal rating on it, which is their fancy way of saying "buy this now before it expires." And expire it will - the offer ends Aug. 31, so you'd better act fast.

ZDNET, with its 33 years of experience, 30 hands-on reviewers, and a 10,000-square-foot lab, has refined its deal-badging system in 2025 to bring you hand-crafted savings, because apparently, discount codes need a scientific approach now. So go forth, apply ZDNET20OFF at checkout, and may your wallet never wander off again.