Yes. The 3300 comes with a 0.315A/250V - UL Listed Bussmann, GMA Type (Radio Shack GMA/270 series; #270-1046 ) fuse.
Yes. The 3300 DMM does have a low battery warning.
The 3300 DMM uses one 9V battery.
Yes. The 3300 DMM has Automatic negative (-) polarity indication symbol.
No. The 3300 DMM does not have an auto-shut off feature.
The 3300 DMM will measure 10A (DC from 0 to 10 amperes). Unfused DC current (AMPS). * A waiting period of at least 15 minutes is necessary between every 15 seconds testing period.