Tenergy Combos: 15 pcs Sub C 3800mAh High Capacity Rechargeable Batteries (Flat Top w/ Tabs) Up to 38 Amps high drain current rate, ideal for making various battery packs for heavy duty applications such as remote control (RC) toys, electrical guns, power tools and backups. Solderable taps enable cost effective and easy way to make your own power pack of different voltage and shape. Each cell is individually checked before shipping and all the batteries are matched. Ultra high capacity, 40% more run time than Ni-Cd Sc battery. Very long cycle life and Rapid battery charge up