LG MJ1 INR 18650 10A 3500mAh Batteries - 4 Pack - Battery … The LG MJ1 is a flat top 18650 battery with one of the highest capacities available. INR (lithium nickel manganese) chemistry offers a superior 3,500mAh capacity compared to most IMR (lithium manganese) cells, while having a maximum discharge current of 10A. The flat top terminal design is ideal for use in creating battery packs.