krus_aragon
Established Member
Batteries that drop to 1 per cent toward the end of their discharge and then stay there typically do so because something's gone wrong with the charge consumed/remaining calculations, or the health of the battery isn't what it used to be. It's a kind of signal saying "I don't know how much charge is left, but I'll keep going for as long as I can". There's a bit of the "how long is a piece of string" in play at this point, especially if you don't know when the indicator dropped to 1 per cent.Which means it needs 1% battery (it'll last ages on this level in flight mode) and for the screen to work.
Your point about reducing current draw by turning off power-hungry options and entering flight mode is also relevant before getting down to a low state of charge: the earlier you do it, the more charge you'll have left!