man, that sucks =(

yeah, if you are running them in parallel then you should be good, if you were running them in series, I wouldn't think that you would even get 10 min out of them. I bet the extra weight might have done it to ya, just because the motor has to draw more amps to maintain the hover with a heavier weight load. No idea what the stock ESC is rated at, but I imagine that it isn't rated over 20A with a heatsink, which it doesn't have, probably much over about 12 to 15 would toast it. If the batts were completely dead when you finished, the max average you could have drawn is 10.92A.

anyways, yeah I would say 25 is probably a good size. CC makes a better esc than electrifly, but costs a good deal more. If it's not worth it to ya, then go with the cheaper one. I usually size an ESC just over what the max amp draw for the motor is. In a 370 for example the resistance of the stock motor as measured from one commuator lead to the other is 0.6 ohms, so if you take 12v and divide that by 0.6 ohms, you get a max current draw of 20A, so a 25A ESC could take the full brunt of the motor in a stall. Not sure where the 380 rates though.

Sorry about your bad luck =( on the upside, you get to get all new parts that are half way decent instead of the stock stuff