Phone dying at 40-50%

[Slusk17]

My One M9 is dying at 40-50%. How do I fix this?

 

[m1racle]

Stock ROM? The battery could be faulty too, hard to see if it's swelled with the M9 obviously but it's worth taking to a service center

 

[B. Diddy]

Yeah, I would suspect a failing battery as well.

 

[Slusk17]

Yeah, I would suspect a failing battery as well.

I've had it for only 2 years. Is this normal?

 

[ColbyJvonBrown]

I've had it for only 2 years. Is this normal?

This is very normal. Batteries degrade over time. They aren't meant to last forever. You should probably get a battery replacement from HTC or another certified dealer.

 

[B. Diddy]

Battery degradation depends on your usual usage pattern. If you regularly let the battery discharge to near-zero, that shortens the lifespan of the battery significantly. Many experts recommend recharging when you reach 30-40% as a rule of thumb.

Batteries can also develop dendrites, which lead to sudden dropoffs in battery charge. These are unfortunately irreversible, and require replacement of the battery.

 

[IAmSixNine]

Also heat is bad on batteries, so if you have a case which prevents heat discharge, or play games while charging or any other number of scenarios repeatedly in the life of the 2 year old phone that too can shorten the life of the battery.

 

[JRDEMASKUS]

Sold my M9 last week for the lack of replaceable battery. I was not the original owner. No "warranty".
The phone was great, but it is 2 yrs from release and I didn't want to get stuck with a brick sometime in the 3rd yr.
ifix says it is a difficult task to replace the battery. I expect The phone may never be the same, like a wrecked car after repair. With a lack of users reporting results of a repair, I had to jump off.
Got a barely used Note 4, after my wife and friend replaced their batteries and said they would buy the phone again.