EcoPower "Electron" 2S Li-Poly 30C Hard Case Battery Pack (7.4V/5000mAh) (ROAR Approved)
[ECP-LPH-5000-2S30]

EcoPower "Electron" 2S Li-Poly 30C Hard Case Battery Pack (7.4V/5000mAh) (ROAR Approved)
Ryan Badger - Rating: 5 of 5 Stars! Verified Owner Tuesday, June 10, 2014
I bought 4 of these batteries for my Mamba Monster 2 equipped E-Maxx. Even through multiple full-power runs, they don't get too warm. I did swap out the Deans connectors for EC5, but that is it. I've only got 4 cycles on them, so longevity is still out. But I can get 30 minutes of runtime out of a pair, and with the 2C charge time, you can get them back up in a little over 45 minutes. Not too bad! Two of the packs are a bit lumpy, but I don't know if they are swollen, or just like that from the factory. If they end up swelling up, I'll update the review accordingly.