Hard starting, corrosion at terminals, eventually cause a weak charge on the battery from cranking too much, will not start at all, can cause your carburetor to flood.
I'm not so sure :(
check your battery cables loose or dirty cables will cause this. if the problem persists check the reg/rectifier
Bad Alternator, Bad Battery, loose cables
Dead battery? Loose or corroded battery cables? Blown fusable link?
Weak battery? Loose or corroded battery cables? Starter solenoid?
Loose alternator drive belt or loose or corroded battery cables. The battery itself may also be bad.
Weak battery, corroded or loose battery cables, failed starter.
Weak or dead battery Loose or corroded battery cables Blown fuse or fusable link
Dead cell in the battery or corroded or loose battery cables.
Check for loose or corroded battery cables Check for loose connection at starter or ground
Loose or corroded battery cables? Bad starter - excessive drag --excessive resistance
A loose battery cable can cause your vehicle to on most stall and it can cause the lights to Flickr. Make sure your battery cables are tight and free of corrosion.