Specifications Connection:Others High-concerned chemical:A-alpha-C (2-Amino-9H-pyrido[2,3-b]indole) Nominal Capacity:3500mAh/7000mAh Voltage:7.4V 12V 14.4V 18V 21V25.2V Size:18650 Application:Electric Chainsaw,Jack Hammer,Power Saw,Corded String Trimmer,Vacuum Cleaner,Electric Sweeper,Power Tool,Garden Tool,Construction Tool Model Number:18650 battery pack Type:Li-Ion Brand Name:roza cinnie Origin:Mainland China Certification:CE,FCC,RoHS,UL,KC Rated Voltage:12V Battery Model: 18650 35E Rated Capacity: (1P) 3500 mAh (2P) 7000 mAh Discharge Current: 20A Rated Voltage: 2S 7.8V/ 3S 10.8V/ 4S 14.4V/ 5S 18V 6S 21.6V Charging Voltage: 2S 8.4V/ 3S 12.6V/ 4S 16.8V/ 5S 21V 6S 25.2V The voltage of a single cell is between 3.6V and 4.2V. Before assembling the battery pack, we will select the battery filter to ensure the voltage/internal resistance/capacity match. Therefore, if you receive the battery, the voltage will reach: 2S1P/2P: 7.8V-8.4V 3S1P/2P: 10.8 V-12.6 V 4S1P/2P: 14.4 V-16.8 V 5S1P/2P: 18 V-21 V 6S1P/2P: 21.6V-25.2V This is normal, please pay attention before purchasing, thank you. Use: for various tool batteries, screwdriver batteries, battery packs, etc. Supporting facilities: 2S1P/2P 3S1P/2P 4S1P/2P 5S1P/2P 6S1P/2P Note: Light shooting and different monitors may cause the color of the item in the picture to be slightly different from the actual object. The measurement allowable error is +/- 1-3cm.