Lead-acid battery chargers charge lead-acid batteries in a effective way that can provide smaller batteries ready to use in 5 hours and larger as quick as 12 hours. Lead-acid batteries utilise a method of charging called 'constant current constant voltage' This process uses a regulated current. That current works to raise the terminal voltage within the battery until the limit of the upper charge voltage is met.
Tips for using a lead-acid battery charger:
Only operate charging in a dry, ventilated area.
Do not over-charge: Keeping the battery on the charger for too long.
Do not under-charge: Removing the battery before it has time to fully charge.
Ensure you check fluid levels