roduct details: Made in Korea Battery Name: 18650 cylindrical lithium-ion batteries+ Nickel sheet Battery Type: INR18650-25R Battery Capacity: 18 * 66 (mm) Battery material: Lithium-ion (li-ion rechargeable lithium-ion battery) Battery voltage: 3.6 V Rated capacity: 2500 mAh Battery Current: 20A continuous discharge, more instantaneous current. Battery Weight: 45 g Application Type: Electronic Cigarette HM electric tools, wheelarrow, electric icycles, batteries and other military medical communication. The charge and discharge criteria: 500-1000 times higher than the charging voltage of 4.2 V in the discharge voltage 2.5 V cut-off