DuraTrax 7.4V 4000mAh 25C LiPo pack
The new DuraTrax LiPo 7.4V 4000mAh 25C car/truck stick pack is ideal for any 6-cell sub-C NiMh application, where LiPo power is preferred and a Traxxas plug is required. Featuring a high capacity and high discharge current rating, in a pack that’s nearly half the weight of an equivalent size NiMh battery, it is wired for balancing, and the connector is protected by a hardened ABS case.
Source: Duratrax [duratrax.com]