#CAR BATTERY CHARGER HEAVY DUTY FULL#

) to see how much capacity is left in the battery, and using a battery charger to top up its charge when necessary.

The answer in all these cases is frequent testing with a , because the alternator produces more electricity and charges better at low Failure is more common on cars equipped with a dynamo rather than an There are also causes other than short trips and cold weather which can affect the state of your battery.

#CAR BATTERY CHARGER HEAVY DUTY FULL#

As the battery nears full discharge, the lights gradually grow dimmer and finally go out altogether. Theoretically, a fully charged battery, without taking in current from theįor about ten minutes, or the headlights for eight hours, and a heated rear window for 12 hours. The loads imposed on your battery may be gauged from the amount of current used by the various electrical components: headlights take about 8 to 10 amps, a heated rear window about the same. Fast charging, however, is undesirable as it can buckle the The higher the charge output, the faster a flat battery is recharged. An average car battery has a capacity of around 48 amp hours which means that, fully charged, it delivers 1 amp for 48 hours, 2 amps for 24 hours, 8 amps for 6 hours and so on.Ī basic charger usually charges at around 2 amps - and so needs 24 hours to deliver the 48 amps needed to fully charge a flat, 48 amp hour battery.īut there is a wide range of chargers with different charge rates on the market - from 2 to 10 amps.

Car battery charger heavy duty