18650 3S Battery Pack
18650 3S Battery Pack . During prototyping i was using your basic dc jack to connect to the arduino and charge the battery pack. This is most commonly done using a spot welder and nickel strip. RoHS 18650 3s 20Ah 12 Volt Rechargeable Lithium Battery Pack from www.rechargeable-batterypack.com They cost a little more, but pure nickel strip has far lower electrical resistance. If you want to build a 12v battery pack using 18650 cells then this video is for you.i run through how to connect (with schematics), charge, and use this 3s. To make the battery pack, you will have to electrically connect the 18650 cells together.