Help Nexus 4 unexpectedly switches off

[Metix]

Hi all, I have a Nexus 4 bought on April 2013 and I've been experiencing some problem with it. First, sorry for my bad english. I have been searching for an help on italian and spanish forums but no one could help me with this issue, I hope to express that clearly.

When the battery level is still at 85/90%, the smartphone unexpectedly starts asking for Pin code and keep on asking it until the phone switches off (in fact in the meanwhile the battery suddenly goes down to 10% of charge or less). I have done a complete reset of the device but it hasn't solved the problem. Is it possible the battery is damaged after only an year of use?

Many thanks for your help in advance.

Cheers,

Metix

 

[Rukbat]

Hi all, I have a Nexus 4 bought on April 2013 and I've been experiencing some problem with it. First, sorry for my bad english. I have been searching for an help on italian and spanish forums but no one could help me with this issue, I hope to express that clearly.

Don't apologize. Your English isn't only easily understandable, it's better than a lot I've seen written by people born and raised in the US. (And if I were to try to answer you in Italian or Spanish, you'd cry. I don't even know enough of either one to be able to apologize for it.)

When the battery level is still at 85/90%, the smartphone unexpectedly starts asking for Pin code and keep on asking it until the phone switches off (in fact in the meanwhile the battery suddenly goes down to 10% of charge or less). I have done a complete reset of the device but it hasn't solved the problem. Is it possible the battery is damaged after only an year of use?

Without actually having the phone to test, it's only an experienced guess, but yes, a battery that's not treated properly can die in 3 months or less. And it does sound like a bad battery.

If you get a new battery, charge it fully with the phone turned off before you turn the phone on the first time. Then use the phone without charging it until the phone tells you to charge it. Do this 3 times. (It does nothing if the battery is freshly made, but if the battery has been sitting on a shelf for months, it keeps the battery from having a short life. And if you ever let the phone sit unused for a long time, remove the battery (leave it at about 75% charge, NOT fully charged), then follow the 3 charge/3 discharge procedure when you start using it again.)

To get the longest life from a lithium ion battery, charge it when it's at about 40% to 60% discharged (except for the first 3 cycles). Constantly discharging it almost all the way shortens the life a lot.