EEMB LIR2032 Rechargeable Battery Charger with 4PCS 3.7V Lithium-ion Coin Button Cell Batteries 45mAh for Car Remote Key Fob Watch

Good product

This small charger looks fragile but does a good job of charging the coin style batteries supplied. A usb cable, supplied, is connected to a phone charger, computer usb socket or similar. A little red light shows the unit working which changes to green when complete. The downside was the batteries themselves which don't last long in use, much much less than the disposable ones. Note I also charged another brand which also had limited user time. In conclusion the charger is fine but the battery technology isn't really up to it.UPDATE. I have thisinfo from the supplier. "The capacity and voltage of rechargeable battery LIR2032 is different from disposable battery CR2032. The battery capacity of LIR2032 is 45mAh and CR2032 is 240mAh. The voltage of LIR2032 is 3.7V and CR2032 is only 3.0V. The max discharge current of LIR2032 is 45mA but CR2032 is 3mA. Therefore, the rechargeable battery may have a shorter running time compare to the non-rechargeable battery. As a result, we do not recommend customers replacing CR2032 with LIR2032 in some devices."

Seems to be a good buy but only just got it so will need to asses over a longer period

I bought these because the title said "For key fob" but on purchasing and trying them they did not work. After first thinking my fob had lost synchronisation I eventually discovered that the non-rechargeable versions are 3V, not 3.7V as these are. So if your key Fob is tolerant of this the great but mine (ID.3, ID.5) are not so these are completely useless. I know it says 3.7V but did you know there was a difference between them?Going to return them.

Works well saves me buying random packs of battery’s will be good value over time over time.

Changer has micro usb socket as power input from an external supply. Unit charges one or two batteries at a time.

Really simple to use. Small charger about the size of a big plug with 2 slots at the top for batteries. The instructions were easy, you line up 2 button cell batteries to the correct poles of positive or negative, slide into the slot and charge. Once the plug is in, the lights go on. No light means you've inserted incorrectly. Red for charging and green for charged. Batteries can be removed with a bit of tugging and can be a bit slippery as the grip holding the batteries in place is strong. That's the only reason I'm giving 4 out of 5 stars as everything else is pretty reasonable. There should have been a release lever to remove the batteries rather than having to grapple with removing them. My fingers are not nibble and it would be difficult for people with dexterity or arthritis. I guess you can use a tweezer though. It's like trying to yank 10p pieces out of a mini vice/slot machine with only the tips visible once slotted into place. It's a little frustrating. I did buy a mini charger of one to compare which takes twice the time to charge so this is really good value.

I didn't realise until recently that I could buy rechargeable button cells, but this definitely saves time and money.