I just ordered 3pcs 1100mAh backup batteries for n900. Now I started thinking ways to have longest possible continous battery life. power over usb to keep device running when switching batteries(experts opinion needed) hardmod one battery with connectors continously plugged in and glue it into cover(probably too extreme but doable) other way to feed power to keep the device alive during battery switch tweaking os for hibernation?!?! !