Phone dying at 40-50%

m1racle

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Jan 14, 2017
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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

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Mar 9, 2012
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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

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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

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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.
 

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