12 volt bateries? draining way to fast! help!!!!?

Question

i have a 12 volt battery. my 2 battaries both brand new for my boat keep draining way to fast i hook them up to the charger, cahrge them on 2 amp or 8amp for slow charge and there charged within 10 minuites. then an hour later they lost there charge and there back to like 60 % charge. i took one battary back to the store and got a new one well it does the same thing. im keeping filled wtih the right kind of water and im not setting them on concrete or anything where theyll drain but they still keep draining! whats the deal? could it be my battary charger. i think its like a speed charger from walmart is the name. it only takes like 10-15 minutes to charge up on 2 amp(slow charge) is that to quick? but the battary charger wouldnt drain the battaries, would it? i mean i unhook it from the charger when im done? help please...this is really frustrating

Answer 1

I agree that the first place to look at is the battery charger. 2 amps at 10 min. will not give you a quality charge. An overnight charge would be expected. Trying another charger would be the best way to start.

The next step may be to look at everything the battery is powering. Don't know exactly what your application is. There may be a problem causing the battery to drain to a level that your charger cannot handle, and causing false readings.

Answer 2

After your charger indicates that the batteries are charged, check the battery voltage with a voltmeter set for 14 to 20 volts DC and make sure it reads at least 12 volts. You might want to watch the voltage levels while charging, it should read between 13 and 14 volts while charging when the batteries are nearing full charge. This should help you figure out if it is the charger or the not.

Answer 3

After your charger shows that the batteries are charged, examine the battery voltage with a voltmeter set for 14 to twenty volts DC and confirm it reads a minimum of 12 volts. you could to video reveal the voltage tiers on a similar time as charging, it might study between 13 and 14 volts on a similar time as charging while the batteries are nearing finished cost. this could help you paintings out if it relatively is the charger or the no longer.

Answer 4

You may be getting a false reading from the battery charger.
Hook up a borrowed charger from a buddy and see if things are different.
A 2 amp charge should take something like all night to charge up. Not 10-15 minutes.

Answer 5

You didn't say if you where using a regular 12 volt that you would use in a car or deep cycle batteries for trolling motors. There is a big difference. If that is the problem and you are using it for the trolling motor be sure it is deep cycle. You can also buy a maxi-miser to use and makes a batterie last longer. always check you electrolite in the bateries with a good hydrometer. They can be found at any parts store. this will check the specific gravity of the battery and tell you if the battery is truely bad or not.

Answer 6

A 10-15 minute charge (2amp) be way to fast! Charger may not be drainin' the battery, but ya' just ain't gettin' the fullness of it's worth ie., complete and correct charge. When I charge our's at 2 amps, it'll be on the charger all night. I'd look into a new charger. Good luck and hope ya' get it resolved ;)...

Note: Might want to invest in a battery gauge after ya' figure out your problem, link below is for one that goes with us every trip. Good ta' know where the charge is settin', while out in your boat...

http://www.cabelas.com/cabelas/en/templates/product/standard-item.jsp?id=0043161019016a&navCount=1&podId=0043161&parentId=cat21310&masterpathid=&navAction=jump&cmCat=MainCatcat21276-cat21310&catalogCode=IH&rid=&parentType=index&indexId=cat21310&hasJS=true

Answer 7

Some chargers will also cut back(off) for a little bit if the battery is trying to draw too much(dead battery). You might be mistaking this for fully charged.