ProTek R/C Li-Poly Flat Receiver Battery Pack (7.4V/2300mAh) (w/Balancer Plug)
[PTK-LP-RX2300-L-2S]

ProTek R/C Li-Poly Flat Receiver Battery Pack (7.4V/2300mAh) (w/Balancer Plug)
JOSHUA LONG - Rating: 5 of 5 Stars! Verified Owner Thursday, August 28, 2014
I've been using these for a couple of years now, They have never let me down. I've never had one puff up and I get great run-time out of them.