in a big hurry to charge your android phone?? turn "data network mode" OFF, and ALSO turn "flight mode" ON. BOTH settings need to be made, as unfortunately going to flight mode only will NOT automatically turn off your data network mode, even though your data network won't work. so, to save more battery, you need to turn off both functions. if you wish to not get texts, emails or access the web, if your battery is low, turning off ONLY the data network still allows you to make and receive calls. anyway, turning off data network and turning on flight mode reduces the cpu and battery usage searching (push or pull) for email, text messages, and battery needed for the "radio" (the receiver) function. obviously, you will not be able to make or receive calls, texts, or emails. i feel it helps reduce the time needed to charge by 25% to 40%.