This high quality Sc size 4200mAh NiMH battery can produce up to 40 Amps of high drain current, ideal for building various battery packs for heavy duty applications. It has solderable tabs which provide a cost effective and easy way to make your own battery packs. Each cell is individually checked prior to shipping and all batteries are matched. This battery has an ultra high capacity, 40% more than NiCd Sub C batteries.