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

Not too long ago, I started to switch my flashlights from CR123 powered lights (batteries are too expensive and hard to find) to AA powered lights (plenty bright nowadays, and inexpensive and easy to find batteries). Then, with 18650 powered lights becoming abundant, I started to switch some of my lights to that.These batteries with a micro USB charging ports are great for while traveling. I have an 18650 battery charger, but it doesn't go with me places, so being able to charge the battery with a micro USB cable is excellent.The battery is definitely longer and fatter though, and doesn't fit in all of my 18650 lights. The overall length including the button is 70.75 mm.