It is mega 510 battery, the best match for 1.0ml KR 510 Clearomizer, also from Kanger ecig company. The new 510 battery output voltage can reach 4.2v and 380mah capacity, which can give you stronger throat hit and support 600 puffs. Cutoff time:10 seconds.
Each battery has 3 blue leds on the bottom which can display the remaining power.so you will know easily when to recharge.
The battery is compatible with most 510 cartomizers or atomizers.
Size: Length 83mm/Diameter 12mm
How to charge?
* Please charge the battery with USB charger for KR510 Battery.
* Charging time: 3 hours