Battery Stats Issue

[mayank6002]

My phone often switches off at 20-25% and when I put it on charge, it starts charding from the percentage that it went off at. When I restart at 100%, the battery indicator shows 65-70% and I have to put it on charge again.

What seems to be issue here? Is it just the stat which needs caliberation or is it something to do with battery itself?

 

[41LY45]

My phone often switches off at 20-25% and when I put it on charge, it starts charding from the percentage that it went off at. When I restart at 100%, the battery indicator shows 65-70% and I have to put it on charge again.

What seems to be issue here? Is it just the stat which needs caliberation or is it something to do with battery itself?

You sir, have a worn out battery. It needs replacing if battery life is piss poor.

 

[mayank6002]

You sir, have a worn out battery. It needs replacing if battery life is piss poor.

But tell me, wouldn't a piss poor battery go down to the level of 0% before its demise? Why would a phone switch off at 20-25%? And this behavious is also erratic. Sometimes it shows the battery level of 1% before dying and sometimes it just dies at 20-25%.

 

[calinorg]

If you ever flashed a custom software, battery stats issue should be normal. But if you didn't, it could be either bad stats or worn out battery. Find accubattery on play store, use it for few days and check battery capacity there. If it differs much than manufacturer capacity, it is time for change...
In the meantime, check this post by Motorola:
https://motorola-global-en-uk.custh...a/moto-g4-g4-plus/topic/battery/battery-reset

(It is for g4 but I don't see why it shouldn't work for Moto Z)

 

[41LY45]

But tell me, wouldn't a piss poor battery go down to the level of 0% before its demise? Why would a phone switch off at 20-25%? And this behavious is also erratic. Sometimes it shows the battery level of 1% before dying and sometimes it just dies at 20-25%.

Well it thinks it's at 20-25%, but it can't deliver enough current due to wear.

Remember the iPhone slowdown brouhahah? What Apple did was downclock the processor so it doesn't draw too high from the battery.