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[catengineman]

I'm at home setting up my tug for the venture out into the world of enjoyment
batteries on charge then tested
 :'( ??? :-[ :'(
One 12 volt SLA shows 13.7 v and will drive a motor round very well
Second 12 volt SLA shows 12 v and nowt nada F###all not even a glow from a 6 volt lamp
Third 12 volt SLA shows 13,1 v and again drives motor fine
All the batteries have been on charge the same time and all were correctly connected so what has happened to the second battery? and Y is there no power but showing 12 v on a meter?

This next bit is gona be Poo Hooed even if you short out the terminals there is nowt .

Please help as me tug is slower with only one main drive battery (the other is for aux equipment and bec etc)
Richard,

[Made it to 80 (25p Richer now)]

Sounds like time for a new battery 

[DickyD]

Very astute Bob

Richard

[Made it to 80 (25p Richer now)]

No piont in messing about Richard tell.em like it is  ::) ::)

[catengineman]

There was I thinking I was doing some simple silly thing wrong :-[

Richard,

[Colin Bishop]

At the voltages you quote after charging, the first battery seems OK the second one is dead and the third one may be dodgy - it may drive the motor but not for very long.

[catengineman]

Thanks chaps,

So now I will have to go and cook the spanner her tea. Just so that I can pop to the goody shop and buy some new batteries Oh and while I'm there I could also look around for ??????????????????????
Best not get carried away or she'll have ME carried away

Richard,

[Made it to 80 (25p Richer now)]

Keep the accountant happy Richard 

[Tug]

Just a thought....

You ain't charging them in parallel are you?

[three times 12 equals 12]

[Faraday's Cage]

Richard,

When you get back from the pond, stick your SLA's on charge straight away.
If you leave them for any amount of time in the discharged state, you could have problems similar to the one you've described with the duff battery.  Also keep em topped up every few months if they are left standing.

Hope you didn't burn the tea or else your foray to the model shop will have to wait. 

Terry.

[catengineman]

Youngat65.         spanner happyish.

Tug.         Charging them via three different chargers (all give out 13.9 volts @ low 15.9 volts high @2 or 8 amps )

Faraday's Cage,   Did not burn the tea!,  mmm luv-lee sweet n sour chicken fresh noodles egg fried rice

spanner's favorite nosh (my special) bit of luck that really

Richard,

[BobF]

Hi,
I think its all been said, but are you testing the batteries with a volt meter or a battery drop tester, which tests them under load. A meter can read volts when there are no amps available. IE a petrol tank still smells of petrol when it is basically empty.

Bob

[Shipmate60]

Check the voltage when you connect to a motor.
It sounds like one battery goosed.
Voltage dropping as soon as you put load on it.
Only useful for ballast or local recycling point.

Bob

[catengineman]

Hi, I have a small but working battery tester (load cell or drop tester) and the normal multimeter stuff.

So to upset spanner I serviced our house alarm system today and low n behold it required a new battery!
Cost lay-ed off on household item spanner happy that tug not being spent on - me happy as I get new battery

More than one way to skin a cat!