Originally Posted by DiGiTaLD
Anybody got a procedure for this or hints and tips? I have an FNB-64 that's totally dead, and an FNB-V57 that's well on it's way there. I also have two additional FNB-V57 packs currently in service that will be ineffective before too much longer. How hard are these to get apart, and what's involved? Once the case is open, they can't be that hard to rebuild. You can see the cells in there just by looking at the pack when removed from the radio.
I can't comment on the specific pack, but having worked on others, it can be
a real pain.
The cells are tab-welded together and you'll need to find and remove the bad ones,
or replace the whole stack. Sometimes cells are glued to each other, which can be
hard to separate. Then there's the challenge of getting the case apart without
damage (some are easy, others not) and making sure metal contacts don't get
The replacement cells should be graded i.e. matched for capacity. These should
be available but I'm not the expert on sources. Then you'll need to weld them
togther. Forget soldering, as it takes lots of heat and stresses the cells (been there,
Not to discourage you from trying, but be careful e.g. don't short good cells out,
or have a piece of the case fly into an eye while you're prying it apart...
The battery shell route looks good but the shells aren't always cheap (shop
around), as they know how to get you one way or another. Battery shops can
rebuild packs, but don't expect that to be cheap either.