Liter 3.7V 400mAh 502035 Lipo Battery Rechargeable Lithium Polymer ion Battery Pack with JST PH 2.0mm Connector

Perfect fit, my TENS device works again!

Worked as required.

I purchased the battery because it was the size I needed. I wasn’t sure about the connector because it is hard to tell in the picture. I needed to replace the battery in my electric skateboards remote. I was able to unsolder the old connector and put it on the new battery with no issues. It has been working great so far!

I have some small arduino projects that utilize seeduino xiao microcontrollers with these batteries to power them and they charge well, last a good while. As long as you have a means to properly regulate the charging power to them, they'll last you a while and do exactly what you need.

The original 350 mah battery in my Bluetooth mouse was lasting a day before needing a charge. This battery was labeled 400mah and could fit so I put it in. After 4 months it needs a charge every other day a lot shorter than the original which lasted a week or two when new. I doubt it ever delivered 400 mah.

Do not buy. I plugged the battery into a typical usb charger and it caused the charger to overheat and burned me. These are clearly defective and too difficult to return because of shipping restrictions.

Plugged into my arduino lily pad and it instantly sizzled and let up smoke.

Cumple con su función.