Join Date: Apr 2006
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Re: 110vac draining batteries... Confused
"Any reasonable marine charger will not boot into discharged batteries to prefvent thermal runaway or explosions in-case one of the batteries has failed. it is a safety feature. "
That's the nanny state and companies averse to product liability claims.
"All" of the older chargers will have no problem with this. Most of the analog (big heavy transformer) chargers will have no problem with this.
Most of the new solid-state chargers, for cars and boats alike, will not charge if the battery voltage is 10.5 volt or below. Many modern automotive alternators are set up the same way. The problem is, if the voltage is that low because of a damaged battery, the charger could overheat it and cause an explosion. And the charger companies have found out that too many naive customers just buy 'em hook 'em up, and become part of the 100,000 people who go to emergency rooms in the US, every year, because of battery charging and jump starting accidents. That's also why so many jumper cable kits now come with safety glasses: liability fears.
And yes, that really sucks when all you need is to charge a low battery.