22111 SL-B50 Protected Lithium-Ion USB-C Rechargeable Battery with Integrated Charge Port, 1-Pack

Streamlight is a great product. I use my headlamp for hunting and it lasts all night. Charge off the headlamp itself or the battery itself has a usb-c charger in it. GREAT idea. Works great fits right and does not weigh too much. Worth the price and investment for your product

Holds a charge very well and lasts a long time, even if using flashlight at highest brightness. Love the USB recharging capability.

Works perfect

Bought this as a backup in case I forget to charge the main battery. Size and quality are great. The flash light for it is amazing and long lasting.

Carry a backup. Batteries don't last as long when its cold outside. You can't find these just anywhere and should order them online before you need them. Really nice how easy it is to recharge either in an outlet or in a vehicle with a USB-C cord, or even with solar.

had to replace my older rechargeable battery, holds a charge for a long time and provides flashlight with enough power to give a very bright light.

Streamlight is a great brand and this battery is perfect for what I'll need it for and it's so easy to plug it in to charge.

Purchased as a backup battery for our new flashlight. Battery lasts a long time between chares.