I have a 2+ years old Sony Ericsson LWW phone which is on stock ICS firmware but rooted using ERoot.
Around 3 months back battery started to drop precipitously from 10% to near zero in seconds and phone would shut off. But I rarely let it go that low as I usually charge my phones at 40% - 25% battery remaining range. But in the last month or so this crept up from 10% to 15% then 20% then 30% and 40% and last week 50% and on the last day tested at 65% remaining charge (as reported by phone).
A strange behaviour that was seen towards the end was that once fully charged phone will show battery at 100% for a long time and then start a rapid downhill descent.
As this lead to the phone being literally useless in normal day to day life, I got a new EP500 battery (genuine OEM as far as I can make out). Now even after 4 - 5 charge discharge cycles the battery percentage reports continue to be in the same manner i.e., show 100% for a long time and then switch off at 50%+ showing low battery.
How to rectify this?
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Frighteningly my ZR which is 6 months+ of age has also started showing similar behaviour of rapidly weakening battery (now anything below 20% is unreliable).
Around 3 months back battery started to drop precipitously from 10% to near zero in seconds and phone would shut off. But I rarely let it go that low as I usually charge my phones at 40% - 25% battery remaining range. But in the last month or so this crept up from 10% to 15% then 20% then 30% and 40% and last week 50% and on the last day tested at 65% remaining charge (as reported by phone).
A strange behaviour that was seen towards the end was that once fully charged phone will show battery at 100% for a long time and then start a rapid downhill descent.
As this lead to the phone being literally useless in normal day to day life, I got a new EP500 battery (genuine OEM as far as I can make out). Now even after 4 - 5 charge discharge cycles the battery percentage reports continue to be in the same manner i.e., show 100% for a long time and then switch off at 50%+ showing low battery.
How to rectify this?
--------------------------
Frighteningly my ZR which is 6 months+ of age has also started showing similar behaviour of rapidly weakening battery (now anything below 20% is unreliable).
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