EEMB Lithium Polymer battery 3.7V 820mAh 653042 Lipo Rechargeable Battery Pack with wire JST Connector for Bluetooth Speaker and Solar Lights-confirm device & connector polarity before purchase

Exactly as described, used to replace a battery in a wireless aftermarket games controller for Nintendo Switch/PC. Functions fine and seems to hold charge well. Time will tell on longevity, but seems a well packaged quality battery.

Bought to replace defective rechargeable battery for my Tyrepal system. Easy to replace though had to change connection plug which was larger than original. All charged and working as designed and was great value and much cheaper than having to buy a whole new system due to a failed battery.

Used this battery as an upgrade for my Logitech G Pro wireless mouse, obviously this is not the same size as it's original 240mah battery but after some shell modifications and soldering to the original connector it works like a dream.Substantial weight increase, but in exchange it's gone from 64hrs of battery life in ideal circumstances to over 200 - at my going rate of usage I won't need to charge it more than 3 times per year!No issues so far to speak of, some people seem to have issues with the polarity, which I assume is on the connector end as the cables are the correct colours for standard +/- polarity at the battery terminals. Check your original cables before installing.

Great little battery for replacing a dead battery in my ATH M50 BT headphones, cheap price and much better than my original battery.

I used this a replacement (and physically and electronically larger) battery for a games console controller.

not fit for my purposes as the polarity fried my components as I assumed it was the same as other cells I own, check polarity before use.

I’ve bought many Lipo batteries and have checked to make sure my statement is factual. But this particular battery fried my RileyLink as the connector on the battery was backwards. So has forced me to buy a whole new device. Not happy.

As above.