Surefire 18650 Battery With Built-In USB Charging 3500mAh

The SF18650B is a Lithium Ion protected 18650 battery with MICRO-USB charge capability. This allows the user to conveniently charge the battery using any USB power source such as a USB wall charger, computer/laptop, power bank, or automotive USB port using the included MICRO-USB to USB cable. Additionally, an external 18650 compatible CC-CV cradle charger (not included) can be used to charge the battery; possibly at a faster rate if so equipped.
Features

-High performance 3.6V 18650 lithium ion rechargeable battery with MICRO-USB port for ease of charging – no charging cradle needed
-When plugged into a power source, two LED indicators display the current charge state: Red for charging and Green for fully charged
-3,500 mAh for extended battery runtime
-8-10A discharge rate for functionality in high drain devices such as LED flashlights