Battery Life Question
As part of the design, a lithium ion (or polymer lithium ion) battery has no memory effect, but does lose it's internal stability over time with subsequent charges.
What I've found over the years (and others have seen it too), is that the longer you can go on one charge, the longer your battery will remain stable internally. In some cases, I've seen people charge once a d...
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I've also seen it before with car chargers, but I think that's because people rarely fully charge their phone with a car charger.
A failing lithium ion battery isn't like the old school battery failures. Old school rechargeables with "memory" effects charge up to 99% or so of their most recent full charge each time they're fueled up, so they die gradually over long periods of time. Lithium batteries typically work great for a really, really long time, then drop down to almost worthless in a period of weeks (or less).
A lithium ion battery is basically good for a fixed number of charging cycles after it leaves the factory. The average is between 300 and 500 charging cycles, then your battery will start to fail.
Here's the kicker: It doesn't matter if y...
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I never did figure out what caused it, exactly, but I was able to fix it. I charged my battery completely, then let it completely discharge to the point that it actually shut down because it didn't have anything left to give.
I then left the device powered off, but plugged it into an A/C wall charger and allowed it to completely recharge before pulling it off the power supply.
Battery life immediately returned to 2 -4 days just like it was before the s/w upgrade.
It worked fine for another 8...
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I've also noticed diminished battery life following a charge on a vehicle charger or an incomplete charge of any kind. Always better in a couple days, with good full charges.
I have a theory that there's something in a smartphone's programming that might see the charge on a battery incorrectly. Almost like the battery sees the battery charge at the incorrect level, and doesn't calibrate to the battery until a few charges are done.
I don't know...
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