Specs:

• Brand: Samsung
• Model: 40T
• Size: 21700
• Nominal Capacity: 4000mAh
• Nominal Voltage: 3.6V
• Maximum Voltage: 4.2V
• Discharge Current: 30A Maximum Continuous
• Style: Flat Top
• Protected: NO, UNPROTECTED
• Approximate Dimensions: 21.1mm x 70.4mm
• Approximate Weight: 66.8g

Safety Tips
Li-ion Batteries may explode if you do not charge or discharge them properly. Please note that due to their inherent safety, IMR cells don't have a protection circuit built in. They should never be discharged below 2.5 volts or cycle life/performance will be reduced. Maximum charge voltage is 4.20 volts.

Users must have knowledge on how to charge and discharge Li-ion batteries before making Li-ion Battery Packs. We are NOT responsible for any damage that is caused by the misuse of Li-ion Batteries.

It is not a protected battery.