I need to replace an internal fuse on an old Motomaster battery charger. The fuse is a solder on glass fuse and the only mark I see on it is SB 658. The only info I can tell about this fuse is it is a "slow blow" fuse and I have no idea of the amperage. The charger is a 6A charger so I am wondering what type and size of fuse I can use to replace it. Should I solder on a fuse holder or buy a fuse with axial leads and solder it on?

The lights on one of my bedroom circuits dim intermittently. I replaced the AFCI breaker in the panel but the problem has not gone away. If I reset the breaker (the old breaker and this new breaker) the problem goes away for about two weeks before recurring. What could be causing this? I am planning to check all the outlets on the circuit to make sure the neutrals are secure. But I just wondered if a faulty lamp could cause another lamp on the same circuit to dim intermittently? And why would resetting the breaker (assuming the breaker is not the problem) work as a temporary fix?