SAMSUNG 21700

40T - 21700- AMAZING CAPACITY WITH HIGH POWER.

Samsung 21700 40T is one of the top performing 21700 size batteries, the Samsung 40T is an amazing battery which performs closely to the Samsung 30T in terms of overall power, while offering a superior 4000mAh of capacity. 

AGAIN  - Genuine SAMSUNG. Don't skimp on quality when it comes to your batteries. Stay with a battery with long storage life and safety. 

For your safety and to maintain the battery’s life and durability, please follow these rules:

• Do not over-discharge or overcharge the battery.This will shorten the battery’s life and cause your battery to pop or leak. 
• Please do not short circuit or it will release massive current.
• Do not play with fire! Do not dispose any kind of battery in or near any fire.
• Do not stack more than one battery as it could potentially blowout and cause serious damage to yourself and place.
• Notes: We highly discourage stacking batteries in your device, it may potentially blowout and cause serious harm.

Mooch',s Battery Tests can be seen here. Well worth the read.