Charging 12v 7 amp battery question - Kayak Fishing Adventures on Big Water’s Edge

Iceman · 02-22-2014, 10:01 PM

my understanding is that using the 1/10th rule will maximize the life of the battery. The 2 amp setting on car battery chargers will work as long as it is "auto and not manual" the latter is very unsafe, I have seen quite a few bulging batteries caused by this. If you want to extend the life of the battery use the lower rate, we sell 1/2 amp and 1 amp smart chargers, meaning they know when full and switch to a pulse maintenance cycle like in a float charger.

Big T · 02-23-2014, 07:01 AM

I use the little Shumacher Smart motorcycle battery charger. It's completely automatic and "senses" the batterys requirements for charging. It knows if you've hooked it up wrong and then sets the charge at the appropriate level. It doesn't charge fast at all and is simply a "maintainer" but my 9ah is fully charged in about 7-8hrs from almost dead.

It must be doing something right because I've charged that battery hundreds of times and it still has the same capacity and isn't bulged out.

It's tiny too. Just a little bit bigger than the battery itself.

02-22-2014, 10:01 PM	#1
Iceman Administrator Join Date: Mar 2005 Location: 1-2 miles off the point Posts: 6,948	my understanding is that using the 1/10th rule will maximize the life of the battery. The 2 amp setting on car battery chargers will work as long as it is "auto and not manual" the latter is very unsafe, I have seen quite a few bulging batteries caused by this. If you want to extend the life of the battery use the lower rate, we sell 1/2 amp and 1 amp smart chargers, meaning they know when full and switch to a pulse maintenance cycle like in a float charger. __________________

02-23-2014, 07:01 AM	#2
Big T Member, You Member! Join Date: Jul 2011 Location: Lake Forest Posts: 254	I use the little Shumacher Smart motorcycle battery charger. It's completely automatic and "senses" the batterys requirements for charging. It knows if you've hooked it up wrong and then sets the charge at the appropriate level. It doesn't charge fast at all and is simply a "maintainer" but my 9ah is fully charged in about 7-8hrs from almost dead. It must be doing something right because I've charged that battery hundreds of times and it still has the same capacity and isn't bulged out. It's tiny too. Just a little bit bigger than the battery itself.