Review on 2-Pack SNSYIY 3.7V 3600MAh USB Rechargeable Button Top Batteries For Klarus Flashlight (XT11X, XT11GT, XT30R.) by Mike Flyers

First of all, the voltage of the battery is very high, it is very durable, and it has a very convenient socket, and I like the design of the indicator light, which allows me to easily identify the battery level. Because of this high voltage, the flashlight becomes very bright. However, the battery with its own charging socket also has a disadvantage, that is, the length is a little longer than the ordinary 18650 battery, but this does not affect the use. In the end I think that if you are using an appliance that has strict standards for the length of the battery, I don't recommend this, but if there is a spring on one end, it doesn't affect the use.