.

Similarly, do batteries come charged?

Today most car batteries are sealed, and come more or less fully charged. So unless you have an old car (at least forty years old) you have no need at all to worry about charging a new battery. Just put it in your car and go, making sure you clean the terminals thoroughly before connecting them.

One may also ask, how long does it take to charge a deep cycle battery? Depending on the physical size, a "deep cycle' battery may have 80+ "amp hours" (1 amp per hour at 80 hours) of storage capacity. So to charge a deep cycle battery at 2 amps from a "discharged state", would take around a couple of days (48 hours).

Consequently, does a marine battery come charged?

A typical 12-volt lead-acid battery must be taken to approximately 14.2-14.4 VDC before it is fully charged. Once fully charged, marine batteries should be held at a considerably lower voltage to maintain their charge - typically 13.2 to 13.4 volts.

How long should a new battery be charged?

Always charge your cell phone battery/batteries at least 12 to 24 hours, depending on battery type, to guarantee a full initial charge even if your phone shows that the battery has charged after only a few hours—new batteries can show incorrect charge levels during and after charging.