I bought a Kangertech Dripbox 160 this past weekend. We left the store but came back the next day because we forgot the batteries. We got home and put it on charge so that I would have it while watching the Super Bowl. When I went to unplug it from the cable I could see on the screen it was at full charge. We sat down and watched the game and around halftime I hit it and noticed it was at half charge. I thought that it was just the way these things are since I've never used one but after the game, it was completely dead. I looked up some stuff but none of it really helped. I looked at the batteries and noticed that one had 1500mAh and the other had 3000mAh. Could anyone tell me if that's bad or not? I imagine it wouldn't be good but I wanna know what the risk is before I go back to the store.