Marine Battery

[Shaun78]

My batteries say 2001. They seem ok. I charged them and brought to autozone for a load test. It said Good but low charge. Not sure why as I charged them 1st. I charged it again and the volts were high but the next day they were 10.8 volts but the battery still cranked the engine. Is it maybe 1 bad cell or something???

 

[tashasdaddy]

Re: Marine Battery

if you have 7 year old batteries, they are overdue for replacement.

 

[dingbat]

Re: Marine Battery

Think of electricity like water. Volts = pressure, Amps = flow.

Volts is like pounds per square inch, psi. Says nothing about how much water
is flowing, just how hard it is being pushed. You can have 100 psi (13 volts) and still not have enough flow (amperage) to get the job done.

A load test is used to determine the "flow" of the battery

 

[Shaun78]

Re: Marine Battery

So do you think it'd still good?

 

[steelespike]

Re: Marine Battery

what he said; its time for replacement.Voltage on a healthy battery should close to 13 volts after a 1 hour rest from charging.Your over due for new batteries.Don't buy by price check weight and ratings.Avoid Exide check out Deka.

 

[Shaun78]

Re: Marine Battery

My father-in-law gave me 2 diehard deep cycle batteries that he bought 3 years ago and only used for 1/2 season then he traded the boat. He kept the new batteries and put the old ones back in. Those are holding 12.5 & 12.6 volts. They should be OK. Just hope they're big enough but for free it's for me

 

[JCF350]

Re: Marine Battery

Think of electricity like water. Volts = pressure, Amps = flow.

Volts is like pounds per square inch, psi. Says nothing about how much water
is flowing, just how hard it is being pushed. You can have 100 psi (13 volts) and still not have enough flow (amperage) to get the job done.

A load test is used to determine the "flow" of the battery

A load test monitors voltage at a given amperage flow. If the battery doesn't maintain a certain voltage at a given load it either needs to be charged, or if charged replaced.