Yeah, I share the charger for my TomTom just fine
Again - any charger with a MiniUSB output should work just fine. There is a standard manufacturers are required to meet when using any USB format, meaning they should all put out the same voltage
Notice, though, the word "should" throughout my statement. As we all know, some folks (including manufacturers) believe rules are for everyone but them. Use caution going too cheap or off the beaten path