Sansa Fuze Replacement Battery and disassembly links

I deduce from the disassembly images that the wires that connect the battery to the PCB (i.e., the logic board) are soldered a the board end. Presumably, they’re not permanently attached at the battery end. True?

 

I’m in the process of disassembling a number of bricked Fuze s for their parts. Can somebody suggest a reliable test to roughly estimate how much life is left in one of them? I have a (cheap) digital multimeter and I can at least measure the voltage. But is that sufficient? Do I have to measure the voltage while the battery is connected to a logic board that’s actually doing something, like driving an LCD?

 

The only way to check the “true” voltage output of any battery is with the normal load on the battery.  Just checking the open circuit voltage of a battery using a multimeter is not a valid test.  Dedicated battery voltage testers have a built-in load in them which is why they work.

Sky