a car battery last for about 3-5 years
When you say boat battery if you are referring to a Deep Cycle battery as used to power a trolling motor then no, it is not suitable for use in a car. However, if you are referring to a battery in a boat used to start the engine and it is not a Deep Cycle battery it will work just fine in a car as long as it fits the battery holder, can be strapped down, and the battery posts are orientated correctly.
As long as the battery is kept charged then it should last 3-5 years.
a panasonic triple a battery last about 4 hours nonstop.
about a year.
8hrs
Forever.
Connecting a battery charger backwards to a battery will likely kill the battery, depending on how long the power is attached.
We found boat oil still in the can how long does it stay good before it goes bad
No the battery is built in but should last a long time.
Changing a boat battery can be specific to the type of boat. Many boats have a small plastic box with the battery in it, while others have the battery hidden in a compartment.
A Sanyo phone battery last just about as long as any other battery. Most batteries are manufactured by just a few different manufacturers, and then rebranded.