I've just been texting with my daughter who has an older Samsung Galaxy phone - not 100% sure but from memory I think it's an S3 which would have been purchased new around two years ago, and no idea what version of Android she's running right now. But she's having battery problems, saying that her phone's battery level is currently showing at 9% after having been on the charger overnight. As a result she's missed an important phone call as she put the phone into airplane/flight mode to conserve power - argh!

I know this could be due to any one of a number of things, and many of you will know more about what can cause batteries to die so quickly than I do, and I don't have any more specific information yet than what I've just written above. Sure, there could be a problem with the battery, but my best guess is that she's been on it non-stop for the last seven hours, playing games, accessing the internet via wifi, sending about 500 Facebook Messenger messages, with the screen brightness at 100% and listening to music via headphones at the same time. But I'm only her father so I'm probably making all sorts of negative assumptions, even though they'd be based on observations of her behaviour over the last couple of years!

Anyhoo... for now I just want to be able to see what's using that power. There seem to be 100 apps on the Play store that claim to do that job, so can anyone recommend one that they've found useful and accurate? I know there should be an option under Settings to view battery use, but on my phone it doesn't seem too detailed...

Edit: Added "Android" to the thread title.