How long to charge battery

[JMOR]

Also, a hygrometer works on batteries with access.

 

[dhermesc]

A SLOW, - LONG charge is best for any battery and may even recover an old battery. Fast charging may ruin a good battery and even cause an explosion. Think of a person sitting in an electric chair. They shoot the victim with high voltage and amperage because they want to get the job done in 60 seconds. Life ceases.

Agreed. If I can I use my "maintainer" to charge a battery - .5 amps over a couple days. Even at 2 or 4 amps a "Low" battery should be charged in 5 or 6 hours.