See: Ruddog Distribution

RUDDOG Distribution have introduced the new 4000mAh 7.4V 50C LiIon stick battery pack developed for the use with ready-to-run cars or starter boxes. Measuring 139×46.5x25mm and weighing in at only 125g the battery offers a low weight and high capacity, making it ideal to power cars, buggies and trucks as well as nitro starter boxes where the oval shape hardcase makes for easy adding to existing NiMH “Racing Pack” battery compartments. Using the Lithium-Ion cell technology for durability, the battery uses the same charging CC/CV charging settings as a 7.4V LiPo battery and it comes pre-wired with an industry-standard XH balance port and a T-type power connector.