ProTek RC LiPo Transmitter Battery (11.1V/2800mAh) (Futaba/JR/Spektrum/KO) (PTK-5173)

This is the ProTek R/C Li-Poly 2800 Transmitter Battery Pack and is intended for use with Futaba, JR, Spektrum and KO Propo Transmitters that use a 4x4 AA Battery Tray. This light weight Li-Poly transmitter battery is designed to reduce the overall weight of your transmitter, which is great for those long main events or long flying days! The overall weight of your transmitter will be significantly reduced over the use of typical NiMh transmitter packs (155 grams compared to 225 grams for eight typical NiMH AA batteries!). Try to hold a pack of eight traditional AA size batteries and compare it with this Li-Poly Transmitter pack. The feeling is just awesome, and you get an incredible 9 to 10 hours of run time!  Aircraft Transmitter Compatibility This battery pack is compatible with some Futaba and JR aircraft and helicopters transmitters with modifications. For Futaba air transmitters, you will need to swap the polarity of the positive and negative leads on this battery, as the KO radio