In an earlier message I mentioned that some $2.86 USB wall chargers I got on Ebay did not work with the Sansa Fuze. For it to work, pins 2 & 3 have to be at about 2.5V. On these chargers, pins 2 & 3 had 0.0 volts. While they would work on other devices they wouldn’t work on the Fuze. This is because when pins 2 and/or 3 are at 0.0 or 5.0 volts, the Fuze thinks it’s in read or write mode.
I finally got some 2.5V zener diodes and made the mod bringing pins 2 and 3 to 2.5 volts. The modded wall chargers now work fine with my Sansa Fuze 4G. Material cost? About 5 cents.