Puts out 9A without over heating So more like 25C discharge. The real compacity is roughly 390 to 410Mah. Charge at 2.5c with no issue and the internal resistance avg about 6 per cell. The ones I have that have over 115 cycles on them the internal resistance only jumped up about 10% That's REALLY GOOD! I can not speak enough great things about these Gforce packs. I only fly Thunder Power packs in helis and large Planes but on anything using 4s 4000 or less the Gforce packs are AWESOME. These little two cells are amazing bang for the buck. I've bought roughly 35 of them. Charge at 2.5c at your own risk... I have done it safely many many times on these packs however if a pack/cell/low quality charger (i use a pair of chargers costing more then 500 each that makes a HUGE difference on charging packs at higher amps like I charge the 2 and 3s 30c 1000 and 1300 gforce packs are 4 and 5c and the last a long time and handle the high charge rates just fine... Just be extra careful doing so with low end chargers.) isn't healthy and you charge at 2.5 to 3C you could start a fire easy. (Posted on 2/26/2015)