Specification:1. Product name: Keep Power 18650 3500m Ah 3.7V Battery 2. Brand: Keeppower 3. Model: 18650 P1835J4. Minimum Capacity: 3350m Ah 5. Typical Capacity: 3500m Ah 6. Normal Voltage: 3.7V7. Quality Li-ion rechargeable cell 8. In Built Safety Circuitry 9. Protection Circuit (Against overcharge, over discharge, over current & short-circuit.)10. 4.2 volts max voltage & 2.5 volts cut-off voltage 11. Over 500 charge-discharge cycles Note:1. Please charge this battery with a quality li-ion battery charger before first use;2. Do not keep or use this battery in high temperature or humid environment; Operating Temperature: Charge 0℃~45℃, Discharge -10℃~60℃ Storage Temperature: -20℃~60℃3. Do not use this battery if there is weeping, bulging or any other problem;4. Do not throw this battery into fire or water, or it may fire or explode;5. Do not crush, hit or impact this battery;6. Do not disassemble this battery;7. Keep out of reach of children;8. Battery will be hot when it works, please take it carefully after use;9. If this battery has not been used for a long time (3months), please charge it beforeusing it again;10. If the electrolyte goes into eyes, please wash eyes immediately & go for a medicaltreatment. Package:2 X Keep Power 18650 3500m Ah 3.7V Battery