Lir2450 Rechargeable Battery for Keyless Remote Replace Cr 2450 3v Lithium Coin Cell Battery 2 Pack

I got a pile of these to use in my smart home automation buttons, they fit Samsung SmartThings/Samjin buttons and many other devices, like many tealights. Sure they don't last as long as a non-chargeable Li battery, but keep a few on hand and just rotate them out easily. Do NOT leave them in the charger, had one leak, so charge them then keep them stored. Way cheaper than buying 2450's all the time.

Great charger and batteries. I am very pleased

Easy to use.

I love that we can finally get rechargeable button cells. I hope more sizes and voltages will follow. I accidentally reversed the polarity of two cells in my motion sensor, and they got EXTREMELY HOT very quickly. Later, I put it in my shirt pocket to install another sensor downstairs; somehow, the two cells touched and maybe caused a short through contact. They also got very hot very quickly. Aside from a burn hazard, it might be possible that the reaction could run away and cause a fire. The makers should put prominent print warnings on the package, and users should be careful about storing and handling these batteries. Otherwise, I think they are a great innovation.

Using this for a device that stays in a barn so it’s exposed to very cold temps at night. It’s holding a charge!

I use these in remote switches and sensors for home automation. The initial charge lasted reasonably long, but then they simply didn't take a recharge. They're effectively expensive single use batteries.

Recharge

I dont know if its the type of batteries or what but they get drained very fast after the device claims they are fully charged.