Features: 1) Lithium ion 18500 cylindrical rechargeable battery 2) 3.6V 1,300mAh high capacity, 3 times the voltage of AA Ni-MH or Ni-Cd rechargeable battery (1.2V) 3) Higher energy density and lower weight than other types of rechargeable batteries 4) Ideal for built-in power packs for R/C cars, planes and robots with less cells needed than that for Ni-MH or Ni-Cd batteries 5) Manufactured under ISO9001 to assure quality 6) Battery tested based on International Electrotechnical Commission (IEC) standard to ensure capacity, quality and life time Applications: 1) R/C applications, cars and planes 2) Safety, alarm, metering, power backup 3) Built-in portable power devices needing high energy density and low weight Cautions: 1) Use special caution when working with Li-ion cells, they are very sensitive to charging characteristics and may explode if mishandled 2) Make sure user has enough knowledge on Li-ion rechargeable batteries in charging, discharging and assembly before use 3) We are not responsible for any damage caused by misuse or mishandling of these Li-ion batteries Specifications: 1) Capacity: a) Nominal: 1,300mAh 2) Dimensions: a) Diameter: 18mm b) Height: 50mm 3) Weight (typical): approx. 34g 4) Nominal voltage: average 3.6V 5) Peak voltage: 4.2V 6) Discharge cut-off voltage: 2.75V 7) Internal resistance: 8) Cycle performance: 85% of initial capacity at 300 cycles 9) Cycle life: > 300 cycles 10) Max. charging current: 1C or 1.3A 11) Max. discharging current 1.9C or 2.4A (for continuous discharge)