S6 Edge sudden battery drain

[PaulAllen76]

On my S6 Edge I'm seeing issues where the battery suddenly drains from around 20-15% down to around 1-3% almost instantly, could this be a fault with the battery itself?

At the time of it happening I'm not running anything different app-wise and it only happens when the battery hits around 20%, although not every time.

I've had the phone since last April and only really started to see this sudden drop issue intermittently over the past month or so. The battery performance in general was pretty poor over the past few months but the recent Marshmallow upgrade seems to have helped this but the sudden drop issue still remains.

[63johnw]

Hi, did you perform a factory reset after updating to marshmallow? Samsungs are notorious for needing this, much more than other manufacturers, and a reset often cures such issues.

[PaulAllen76]

No I didn't do a factory reset but the issue was present both before and after the Marshmallow update.

[63johnw]

If you try a reset and that doesnt help you may need to send the phone for a repair, I would go direct to samsung as they have more scope with repairs etc.

[PaulAllen76]

Ok thanks will give a factory reset a go and see if that helps things.

[BandOfBrothers]

Hi

Please do create a back up before carrying out a factory reset to preserve the data in your phones storage memory. 

I'd second approaching Samsung first either by one of their service centres or uk support site. 

[hrym]

If a reset doesn't do the trick, this sounds like a battery that's nearing the end of its life.  I'd have to say that this has come fairly quickly, given how long the S6 has been out.   Have you been allowing the battery to go flat, rather than keeping it charged as much as possible?  Doing so will considerably shorten the life of lithium-based cells, which have no memory effect and don't need conditioning.   The general advice is to switch off at 10%, or at least engage super-low-power mode.

[PaulAllen76]

Probably a bit of both really, I haven't purposefully been trying to run it flat but occassionally it does happen.