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[Lesdit]

Hello,
I just picked up a used 2009 X, and was wondering about the battery:
Is it true that the 09 packs have no cell management ? I heard that the new packs
have more sophisticated electronics inside.
I've had bad luck with batteries overall in my vehicle history, including hybrid car cells, and assorted lead acid batteries. Batteries hate me
All it takes is one cell out of the 168 to go bad.
I do have the newer charger.
Am I over worried ?

[picasso]

according to zero my old pack was balanced great but the cells had lost a large amount of capacity. So I think it going to be a time problem more then anything about balance with these packs. The main thing that sucks is if you ever need to get to the cells we are shit out of luck. I don't think one can take apart the pack to get to a bad cell with out mucking the heck out of everything.  If it worries you start looking for other options as far as replacment go. And ass load of R/C batts seems fun.

[Lesdit]

OK, thanks for the info.
I did see some tests of the 15ah A123 prismatic ( pouch) cells on utube, they look very promising.
The guy was pulling 200 amps from one cell !

If anyone has a bad zero x battery they want to sell, I'd like to try something with it.
Maybe some regular A123 cylindrical cells as well.