The Castle Series Wire Harness with T-PLUG connectors allows you to connect two battery packs in series, combining the voltage of your batteries. For example: two 3S (11.1v) packs will have the outp....

The Castle Parallel Wire Harness with T-PLUG allows you to connect two battery packs in parallel, combining the capacity of your battery packs. For example: two 3s (11.1V) 6000mAh packs will have th....