Exceptionally high quality lithium-polymer battery pack. These battery packs are far superior to many competing brands, especially those low-cost types sourced directly from Far-Eastern retailers. Each pack comes with guidance notes on what to do / not do to get the best performance & life expectancy. As standard this battery is supplied with a T type connector fitted, however, we can fit other connectors. Just let us know what you need before ordering. The balance lead is fitted with a 4-pin JST-XH type connector.