Battery reconditioning

[odin]

Apple refused outright to replace it. After that I vowed never to buy another Apple product which didn't have a removable battery, but then the iPhone came along... :roll:

Eh? The IPhone's battery can't be replaced?!

[motorollin]

odin wrote:
Eh? The IPhone's battery can't be replaced?!

Nope. Not officially anyway. Like the iPod, the battery is sealed inside the housing. The only way to get it out is to use specialist tools to get the case open.

--
moto

[Oliver]

motorollin wrote:
Are you saying that the battery might not actually be as bad as the computer thinks? Or that it's not actually fully charging it? Or both? Or neither? :-)

--
moto

The battery management IC may not be reporting an accurate assessment of the battery's state to the computer. The OS may then not indicate the accurate state to you, and may not make the appropriate power management decision at the appropriate time.

That is the most general way I can decribe it, without going into specific scenarios. Hope it makes sense.

Oliver

[motorollin]

That makes perfect sense - thanks :-)

--
moto

[danamania]

fwiw, it's not all LiIon batteries that have a limited life from the date of manufacture - it's specific kinds of LiIons, and newer ones seem a bit more fragile than older ones.

Posting from a G3 powerbook that last night ticked a bit over six hours web/irc/writing/wireless 'net use on a pair of batteries - one built in 1998, the other in 2001 - both LiIon (I have another spare here somewhere that still gets about 2 hours, too)

Dana

[KThunder]

the controller ics for lithium ion batteries have to deduce charge from last charge time and length and amount of usage. some use temp also. this is because lithiums output voltage varies so little from full charge to no charge.
lead acid are pretty easy, 13.5 or so is full less than 11 or so is empty and go to low and yiu can fry them unless they are deep charge.

the degrade of lithium storage with age is unpredictable, or is only if you can keep track of charge history, temperature and usage over the entire history of the individual cells- kindoff tough. the tesla lithium ion powered car has an individual cpu for each of its thousands of cells.

nicad batteries build stalagtites of electrolyte meterial between the poles with use that eventually short the cell out. they can be burned off with a couple microseconds of high (110v or so) zap. that returns power to original for a short time but they usually grow back quickly.

[NoFastMem]

motorollin wrote:

What if I put in some more lithium? ;-)

I think you'll find these are your weak link:



:-D