[dyauspitr]

Most of these batteries are on full warranty for 8-10 years. You should definitely make full use of it during that period.

[zihotki]

Read the fine print - there is usually a limitation on charging cycles. So battery can be out of warranty even if it's 3 years old but reached limit on charging cycles.

[dyauspitr]

It’s not. For my ford it is 8 years or 100,000 miles whichever comes first. It’s not about cycles.

[lostmsu]

How are cycles counted if the battery is not drained fully?

[ragebol]

Does that warranty still apply if the battery is used for other applications besides it's core function of powering the car?

[zihotki]

The car battery warranty is often for X years or Y cycles, whatever comes first.

[ragebol]

Yeah, I guessed so. Using it as a home battery with incur a lot more cycles I suppose. Although if the battery is large enough so that a day of powering a home only drains the battery eg. 10%, how does that factor into the cycle count? Is that somewhere in the small print maybe?

[dyauspitr]

I would look at your warranty, mine is 8 years or 100,000 miles. It doesn’t have a cycles stipulation.