That worry seems relatively justified, as it was only a few years ago that Samsung's Galaxy Note 7s were bursting into flame due to battery issues. The debate goes well beyond the worry of moderate harm to a device, as some people have fears of 'overloading' a smartphone battery. In fact, how much should you charge your phone? When's the right time to plug in? Should it go down to zero every time? Up to 100%? How do you get the longest life out of the battery inside a smartphone? Does it really matter if you're only going to keep the handset around for a couple of years before an upgrade? Should you leave your smartphones plugged in overnight? Is it bad for the phone? Bad for your safety? What's the right thing to do? There are a lot of questions about cell phone batteries.

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Does low battery mode hurt your phone