Battery Chargers

An ordinary automotive battery can produce 1 amp for 48 hours, 2 amps for 24 hours, 8 amps for 6 hours, and so on with a fully charged battery having a capacity of roughly 48 amp hours.

A simple charger typically delivers 2 amps of charging power, thus it would take 24 hours for it to provide the 48 amps necessary to fully charge a flat, 48 amp-hour battery.

But a broad variety of chargers, ranging from 2 to 10 amps, are available on the market. The speed at which a flat battery is recharged depends on the charge output. Fast charging is not preferred, though, as it can cause the battery plates to budge.

The quantity of current used can be used to estimate the loads placed on your battery.