ProTek RC HV LiPo Hump Receiver Battery Pack (7.6V/2600mAh) - PTK-5502

(This battery is a direct fit in Kyosho and Tekno 1/8 scale battery boxes, and will provide improved power and response from your HV servos. 4)ALWAYS use a LiPo charging bag. Wait about 20 mins, then inspect prior to recharging.