As safe as any car battery. They are full of acid so don't let them spill or tip over. The main difference is they can be deeply discharged and recharged many, many times.
Sort of: you would need about 80 motorcycle batteries 10 to 20 Car batteries Or six to 8 of the correct golf cart batteries.
no
no, but they can be rebuilt.
Anecdotal opinion says golf cart batteries will last three years under normal, everyday, use.
no you can also use gas it just depends on type it uses.
Yes they will work, golf cart battery have a few more plates in them for longer run time.
Spare golf cart batteries can be bought from a number of specialist golf hardware providers both online and in a specialist golf store. You can also purchase them from specific golf cart dealers.
It depends on the ratings of the batteries and how they are connected.
No!
Golf cart batteries can be purchased in your local area at designated retailers, ordered from the manufacturer by telephone, or purchased online at one of the dozens of online retailers who carry your specific Golf Cart Battery brand.
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Golf cart chargers are automatic and will shut off when the batteries are fully charged. Just connect the charger and forget it.