Thread: Deep Cycle Batteries

Originally Posted by garrycol

My 101 came with two deep cycle batteries that are most likely dead but I want to find out.

The still have 12 v but at home - is there a way I can test them with a bit of load to see if they die?

Thanks

Garry

You can test them with a load tester, I dont haveone but a auto lecky'swill and all the batterry shops will. take the batterrys to somewhere like "the battery factory" in fyshwick, they will tell you straight away.

cheers steve

Originally Posted by Disco Steve

You can test them with a load tester, I dont haveone but a auto lecky'swill and all the batterry shops will. take the batterrys to somewhere like "the battery factory" in fyshwick, they will tell you straight away.

cheers steve

Do you mean "2 deep cycle batteries" all up or do you have a normal cranking battery as well, deep cycles aren't designed as starting batteries, Regards Frank.

two deep cycle batteries in parrallel - supply the 12v system to the the car - the two other 12v normal batteries in series provide power for the 24v systems = I have four batteries in total - 2 in a 24v starting and car system circuit recharged by a 24v alternator and two 12v deep cycle that provide 12v and recharged by a 12v alternator - yes my car has 2 alternators.

I really do not feel like lugging 2 deep cycle batteries to the battery man and then deal with the sales pitch when I I find they are dud - as I suspect. Hence the post - is there a way I can test at home after they have been on slow charge for 24 hours.

Cheers

Garry

Originally Posted by garrycol

two deep cycle batteries in parrallel - supply the 12v system to the the car - the two other 12v normal batteries in series provide power for the 24v systems = I have four batteries in total - 2 in a 24v starting and car system circuit recharged by a 24v alternator and two 12v deep cycle that provide 12v and recharged by a 12v alternator - yes my car has 2 alternators.

I really do not feel like lugging 2 deep cycle batteries to the battery man and then deal with the sales pitch when I I find they are dud - as I suspect. Hence the post - is there a way I can test at home after they have been on slow charge for 24 hours.

Cheers

Garry

Do you have a multimeter???

Obviously a meter will give you the voltage - but it will not tell you how much power it's holding (amps)

As suggested a auto battery shop with a proper tester...............

...................or get a high power headlight, spotlight, foglight........

Wire it up and see how long the battery drives it for

Calculate the state of the battery by the time it runs x the amps of the lamp. (if you dont know the amps of the lamp divide the watts by the volts) ie 200 w / 12 v = 16 amps +/-

Obviously this is rough and ready - but it will give a good indication

Originally Posted by ladas

Obviously a meter will give you the voltage - but it will not tell you how much power it's holding (amps)

As suggested a auto battery shop with a proper tester...............

...................or get a high power headlight, spotlight, foglight........

Wire it up and see how long the battery drives it for

Calculate the state of the battery by the time it runs x the amps of the lamp. (if you dont know the amps of the lamp divide the watts by the volts) ie 200 w / 12 v = 16 amps +/-

Obviously this is rough and ready - but it will give a good indication

My meter does read Amps. but I know most dont.
what ladas sugestted will give you a good idea.

If you have to replace them look into the Trojan brand. I used them on my motorhome and are very good and also have a good crank amps if you need them to start the engine occasionally.

Originally Posted by ladas

...................or get a high power headlight, spotlight, foglight........

Thanks

Would a 100w spotie suffice for the load test that an auto electrician would do - what about the specific gravity test?

Garry