Help Is there an app that will test battery health?

[QuadConPana]

Shortly after purchasing my Galaxy s4, I purchased an extended battery and put the factory battery into storage. Recently, the performance of that battery had declined to the point that I decided to begin using the factory battery again. The battery performance of the factory battery is dismal. I did a spin test, and if the battery is bulging, I can't detect it.

I live in FL, though, and the phone has been stored in a hot car. I have returned to the car to see that the phone has shut down because of battery temperature. Were it not for the spin test, I would be certain that the problem was a worn out battery. However, this battery has spent maybe 3-4 months in the phone, and I would rather be sure that the problem isn't related to the phone itself, especially since I have about a month until I could no longer do a warranty replacement.

Is there any way to test the battery capacity through software?

 

[EarlyMon]

All of the apps that claim to test battery health that I've investigated have turned out to be snake oil.

If you leave a battery without a charge in storage for a length of time, it dies. One of mine did it after 6 months. With a charge, they can last quite a while. That's why you see new phones with some sort of decent charge anymore - shelf life is extended.

You can see the power level with a number of apps - System Panel for example. But if it won't hold a charge, and it's been stored without one, it's almost certainly the battery.

 

[QuadConPana]

Thanks for the info. I didn't realize that sitting could ruin a battery. Since the number of hours of use was low, I thought the battery was too "new" to have such poor performance. Hence, I thought it might have something to do with the phone/system/processor. I feel a lot more confident that replacing the battery is the answer.