8 pack NiMH AA rechargeable batteries, Capacity:1600mA

Up to 1200 cycles and low self-discharge make sure it maintain 75% rates capacity after 3 years no use

Smart rapid charger with 4 LEDs show the charging process, when charging, the LED is red, when fully charged, the LED is green

With a USB input interface, you can charge via varieties of charging options such as laptop, car charger, mobile phone charger, etc

Built-in MCU,automatically turn to trickle charge, overheat-detection to prevent over-charging, short circuit protection and reverse polarity protection, stop charging when voltage up to 3.4V