8. Dump the widgets
Yes, widgets are a key part of Android, and we're trying to keep this guide practical and not simply tell you to nuke everything, but do you really need a constantly updating Facebook widget on a Home screen? It's just full of boring people's boring baby photos these days anyway, and updating widget content puts a constant strain on your battery throughout the day, even if you just activate your phone for a few seconds to check a text message.
9. Remove haptic feedback
Surely your brain's had enough practise using touch devices that it knows if you've pressed something or not by now? If so, turn off all the haptic feedback options. These little bumps and grinds use power each time you press a key, so try to get used to life without physical feedback.
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10. Switch off GPS
Unless you're one of those people who's still using Foursquare to tell the world about it every time you go out to the shop to buy a packet of crisps, there's little reason to have GPS constantly active on your phone. Turn it on when you need it, and use the option to have your phone detect your location through the wi-fi connection. Wi-fi location is usually close enough an approximation for most apps. And if they do need GPS, they're clever enough to tell you anyway.
11. Put your phone on the windowsill...
A strong connection to your phone network requires less power to maintain, so the technical people tell us. So instead of keeping it in your pocket, stick it somewhere and point it in the right direction so you see the maximum number of connection strength bars. Simply flipping your phone 45 degrees on your desk might actually make the battery last longer. What a mind-blowing revelation, eh?
12. ...and keep it cool
Batteries work best in cooler temperatures, with prolonged warm periods gradually lowering their efficiency over time. Putting your phone in a looser pocket might help, or perhaps just gently fanning it while it charges. That might not be the best use of your working day, but at least you'll still be able to get on Twitter on the train home.