Your mobile phone burns up battery life when it spends extended periods of time searching for signals. When you're in an area where you won't be getting a signal — library basement, tunnels, rural highways — aeroplane mode can help save your juice.
Lifehacker reader Balders2 was tired of his Droid using up significant chunks of battery life when he was in no-signal areas for extended periods of time. His solution is free, easy and a great way to lengthen your time between recharges:
Photo by MarinaAvila.
Switch your phone to aeroplane mode when you can't get a signal and save battery life.
I find that my Droid eats a lot of battery when it is searching for a signal. If I know I am in a place where I can't get a signal (i.e. parking garage, subway, etc). I switch it to aeroplane mode to save the battery.
Aeroplane mode, for the unfamiliar, temporarily kills all the radios in your phone — like the mobile and Bluetooth radios — for safe use aboard an aircraft. Since active radios are the one of the biggest power sinks on a phone and a phone that can't find a signal will keep firing up the radio to search for one, aeroplane mode has a huge potential to save your battery life next time you're in a no-signal zone.
Have your own tricks for extending battery life on your mobile phone? Let's hear about it in the comments. Thanks Balders2!