LIR2032 Rechargeable Battery Charger with High Capacity 3.7V 70mA 4pcs Button Batteries Can Replace Coin Cell Lithium ML2032

My weather station requires a rechargable 2032 battery. I had replaced the battery and after about a year, it quit working. I bought this for two reasons. It had 4 rechargable batteries and a charger. It was received very quickly. I did a quick charge on a new battery and put it into the weather station and I was back in business. Time will tell if the new batteries will hold up to the rigors of a Minnesota environment. I did try to recharge the old battery in the charger and it took a day to recharge it.

I used this to power a Remote ID module for FAA compliance. The LiR has been recharging great and giving good performance as expected. You want to keep an eye on voltages because it does drop really fast once you get to the lower end of the cell's operating range. Meaning, if you saw a slow steady decline over 80% of the usable voltage range, once you hit around 90% voltage drops much faster. This does exactly what I needed and expected. Really happy. The charger works great and it's nice to have a slow and fast charge option.

I bought these for a LED dog ball. At first, it seemed like they weren’t going to work out. The charger is nice, but the batteries seemed to die very quickly. One of them quit charging after the first use (no charge indicator light either full or charging), and a second began to have similar issues. I found that they’d eventually take a charge if I just left them in the charger for a while. They all seem to be doing much better now which was surprising. My best guess is that they needed several cycles to break in and develop a memory, but I’m not sure if these kind of batteries actual work like that. One still has to sit in the charger before it decides to cooperate. The overall battery life has actually improved a bit.

I didn't know they made rechargeable coin batteries. I should of known they make AAA, AA, etc. I use these for my red dot sights on some of firearms. I found a deal on Amazon ordered it and was delivered the following day. It's great having the prime membsrship. The unit came with 4 high capacity rechargable 2032 coin batteries. They also have them available in 2016 and few others. It also came with a C type usb cable to plug into your USB outlet which is pretty standard these days. I plugged it in and initially charged the batteries. The charger has led lights to let you know when their fully charged. Overall a great purchase I've recommended it to few friends who I know uses coin batteries. As for how long the battery will last until needing to recharge again, I honestly don't know however, when that time comes I have a charger standing by...

I wouldn't waste your money on this. This charger has all but ruined a half dozen rechargeable batteries. It doesn't charge them past 3.8v and half of them discharge to 0v as a result. If you do use this, I would only use one slot at a time, which makes this inefficient and impractical. Better to just get a single-battery charger if you're going to do that ; it will be more accurate and won't likely ruin entire sets of batteries at once.

Battery exploded with no warning!

This is so cool to have such small rechargeable batteries using a minimum space in your backpack and be charged so fast. Still testing the life of batteries, so, I'll make an update later, so far I love it!

I purchased this kit in order to avoid hurting the environment and wallet when I had to replace my "smart" device batteries. Finding rechargeable CR batteries is hard to come by, and I'm happy I found these. Recently swapped out an Apple AirTag with one of these batteries, and I'm happy to report that they do work.Only time will tell how long these batteries will last. I hope to report by findings at a later time.