if the battery of my fuze is damage can i still use 8?if no.how can i replace it?were can i buy another battery of the fuze?
As far as I know no replace battery is available for the fuze yet.
the battery of the sansa fuze is not user-replaceable. for these kinds of product, i prefer to have an extended warranty. by the time or before my extended warranty is over, i already bought a new player. 
@lean wrote:
if the battery of my fuze is damage can i still use 8?if no.how can i replace it?were can i buy another battery of the fuze?
How do you know the battery is ‘damaged’, and how did it get that way? They are designed to operate for many, many years; much longer than what you could have had yours even if you got one of the very first ones out.
Aside from physical damage, in which case the player would also suffer there is very little that can render the battery inoperable with the exception of very high heat for an extended period of time.
You didn’t leave it in your pants pocket and run it through the washer & dryer, did you? 
