2 Packs 18650 3.7V Li-ion Lithium Rechargeable Batteries 3000mAh For Flashlight Headlamp

Built-in micro USB port - easy to charge with the included 2 in 1 USB cable, no additional battery charger required, just plug into any USB port at anytime and anywhere.

Safety Assurance - built-in integrated safety circuit protects battery from over-charge, over-discharge, short-circuit and over-heat, ensures complete safety for the battery charging.

High performance - EBL 3.7V Li-ion batteries with 3000mAh capacity, support stable 3.7volt output voltage, makes the devices work more stable and lasting longer, great replacement batteries for high frequently used devices.

Build-in LED Light Shows the Charging Process The LED indicator shows the red light when battery is recharging. The LED indicator shows the blue light when battery was fully charged Smart Charging Design - Easy to Charge Anytime and Anywhere Unique design with a micro-USB port in the side of the battery, come with a 2 in 1 USB cable. It can be directly recharged by plug in a USB port like laptops, power bank, wall adapter, etc. Easy and convenient to charge at anywhere and anytime. 

Recharge up to 1200 cycles

These batteries could be recharged up to 1200 times, longer battery life than alkaline batteries, no need to buy batteries
frequently.