The top Android OEMs all offer a battery saving mode on their phones, and with Android 5.0 Lollipop, Google has it, too. No-one likes getting caught short without a charger in sight. The good news is that it's a doddle to set up and use, just so long as you know where to find it. It's easy to miss if you're not aware of where to find it.

That's where we come in. So, here's where to find it and how to use it to help extend your battery life as far as you can.