INR18650 25R Samsung 18650 2500mAh 20A A Grade High Power Li-ion Rechargeable Battery Cell

Important | Safety:

• Never use force to install (insert) li-ion battery.
• Never completely discharge li-ion battery ( below 2.5V ).
• Charge fully before first use.
• Use only high quality Li-ion battery chargers.
• Do not expose to heat. 
• Do not short positive, and negative contacts.
• Do not charge battery over 4.29V (another reason to use good Li-ion battery charger).
• Do not charge unattended.
• Do not store your li-ion batteries fully charged (for extended period of time).
• Store in cold and dry place at approximately 3.7V (storage charge).
• Never try to charge-discharge li-ion batteries with battery chargers that are not made for Li-ion batteries.
• Do not try to open, or modify this battery.