Now officially approved by ROAR for race use!

"Shorty" Packs are designed to give you an extra tuning advantage when setting up your ride, while the pack shares the same width and depth as a conventional 2 cell 7.4v Hardcase Lipoly battery, the length has been reduced. In a standard 1/10th scale vehicle this shorter length allows the pack to be moved forward or backward giving you a tuning option previously unheard of. Maximize your air time with a perfectly balanced Truck, Buggy, or SCT using nano-tech shorty packs!

More than just a fancy name. TURNIGY nano-tech lithium polymer batteries are built with a LiCo nano-technology substrate complex greatly improving power transfer making the oxidation/reduction reaction more efficient, this helps electrons pass more freely from anode to cathode with less internal impedance.
 
In short, less voltage sag and a higher discharge rate than a similar density lithium polymer (non-nano-tech) battery.
 
Unfortunately with other big brands, numbers, ratings, and graphs can be fudged. Rest assured, TURNIGY nano-tech is the real deal, delivering unparalleled performance!
 
Spec.
Capacity: 4200mAh
Voltage: 2S2P / 2S Cell / 7.4V
Discharge: 65C Constant / 130C Burst
Weight: 189.9g (excluding wire & case)
Dimensions: 96x46.4x25mm
Balance Plug: JST
Discharge Plug: 4mm Bullet-connector to your own custom plug