USB Lithium Coin Button Cell Battery Charger with Rechargeable CR2032 Batteries 2 Pack 3.6V Lir2032 Battery for Air Tag

I bought this rechargeable cr2032 for our diabetic dogs tester! No more worrying if a gas station or store carries this size! Charges fast and compact!

Many solar-charging devices like outdoor weather stations and wireless keyboards rely on the rechargeable version of the popular CR2032 coin battery. The newest version is called the LIR 2032.But actual chargers rare. So this is useful. It's small, compact, needs no wires, and plugs into a standard USB port.But there are no instructions. It's fairly obvious that when the little light is red, it is charging, and when it's blue, the battery is charged.

Does exactly what I hope that it would. So far it's a great unit. I expect it'll last many years as it's pretty well built for little unit

What a great idea, everyone needs button batteries and we use a good amount of them, Now just need to buy some more rechargeables.Pros -1) the fact that this button battery charger plugs into a USB like this to be able to charge its own internal battery is awesome. What a genius idea.2) I love how small and simple this is, yes it can only charge one at a time but that's not really big deal, and unless you need a bunch at once, most people only need just 1 or 2 at a time.3) I like the way that it lights up a blue light, the only problem is that it has only stayed blue. I let it charge for a very long time and it's only blue. So I don't know what that necessarily means.Cons-1) this unit did not come with any instructions per se, it has a picture on the box but that's about it so you really don't know what the blue light means. Does it just mean that it's plugged in? The world shall never know. LOLoverall this is a nice little purchase here these kind of things would make a good stocking stuffer for a tech geek like myself.

The one battery I tried in a Samsung air tag went dead in a day. Just now, after return window closed, tried charging battery and it will not charge. Tried a couple different chargers and the battery is recognized as indicated by red light but never indicates a charged condition, Tried for a couple days and no joy. Check your batteries before return window closes. Or try a different brand.

Replacing alkaline AA batteries with NiMh rechargeable batteries there days just makes sense as they are reasonably priced and last a long time. I'm not totally sure it's with it though for CR2032 batteries. The actual capacity for one of these batteries is considerably lower than the non-rechargeable kind. Most uses for CR2032 are low drain devices when are the battery might be in the device for months at a time, non recharge batteries are usually better for those applications. My first use for these was for a iOS compatible tracker, not a genuine air tag but similar, I got about 2 months out of it,before the battery died. It was very quick to recharge and I was able to get it back online quickly,but most of these trackers will run for about a year before battery replacement. I am trying it now in a Bluetooth cycle computer wheel pick up, but I think I will experience simliar life span, ie much shorter than a regular battery. They couldd be very economical compard to the cost of buying regular batteries if you're prepared to recharge and rotate them. I don't have enough experience with them to see what the life span in terms of the number of recharges I'll get from them.

This review is based on first impressions and my experience with charging the batteries, as I haven't used the batteries yet. The charger is much smaller than I expected, making it really easy to travel with and store. It charges the brand-new batteries well. I'm really excited to have rechargeable CR2032 batteries for items like my AirTags, so I can't wait to use them when I need to replace my current batteries.

I have a couple of garage door openers, a few scales and a ton of Apple Air Tags and off-brand trackers that use CR2032 batteries. I was thinking about thinning the herd because buying batteries was getting to be an expensive proposition.Then I learned about these rechargeables. What a game changer!These look and work like regular throwaway CR2032s. The charger included in this pack is easy to use and plugs in just like a regular USB stick. There are kits with more batteries and chargers that accept more than one battery at a time, but this is a great starter pack.Two thumbs up from me!