Quote:
Originally Posted by tigrangh
And another question: on the first day I got my reader, I didn't charge it fully. ( I have connected it to my PC only for a half of hour ) Can this affect on the battery? Maybe all my problems are because of that?
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The PRS-650 is my first Sony reader, so I don't have any personal experience with updates, but from what I have read here on the forum, they DO at least occasionally have updates (I believe they have already done one on the 950).
Adobe is still messing with their Adept DRM to make it compatible with Barnes and Nobel's version. All the current Sony readers use Adobe's code, so we may all get a free update when Adobe get's this sorted out.
As far as possibly damaging your battery by running it down before it was fully charged goes - No I doubt you did anything.
Lithum cells can't stand really deep discharge, so the reader will not allow the battery to be run down to any kind of unsafe level (it just does a hard shutdown first).
I actually had to fully cycle my battery a few times before I started getting full performance.
There is no 'memory effect' at all in Lithum cells, and it's perfectly ok to 'top them off' at any time, even if they only are down to 3/4.
As a practical matter, I try to catch it just as it drops below half, because in my experience, lithium cells give somewhat better life if you try to keep them in the upper part of their charging range.
Occasionally letting them run all the way down to the automatic cutoff point won't hurt anything. In fact it may be helpful on some devices to let the battery discharge to the cutoff point every few months, because some devices need this to keep the battery gage calibrated accurately.
So the simple answer is EVERYTHING SHOULD STILL BE FINE.
If I use the reader A LOT , and don't do anything to conserve power beyond just letting the Readers Sleep Timer kick in and put it in standby mode when I am not using it, then I see pretty much the same things you described.
Remember some folks are going to be REALLY diligent about turning there readier OFF when not being used, and when powered down most of the time like this the reader can indeed run weeks and weeks on a charge. But this is NOT what MOST PRS-350/650/950 owners are doing, and consequently this is NOT the kind of battery life they are getting.
I am pretty sure that most folks are happy if their PRS-350 or 650 can run a week and get all the way through a book on one charge.
So, try to get a few more charge discharge cycles on your reader, and if it still seem like the battery life is just not what it should be, then by all means exchange it for a new one.