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Battery charging question.

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
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rguzz
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Battery charging question.

Post by rguzz » Thu Mar 26, 2020 3:16 pm

Silly question, does anyone see a problem using the bolt holding the blue cable in front of the battery as a chassis ground while charging the battery? It will function as my negative battery terminal, in other words.

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jreed
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Re: Battery charging question.

Post by jreed » Thu Mar 26, 2020 3:51 pm

That sounds like a good place to clip on. It should be a good ground point.
1997 855 GLT (Light Pressure Turbo) still going strong. Previous: 1986 240 GL rusted out in '06, 1985 Saab 900T rusted out in '95, 1975 Saab 99 rusted out in '95, 1973 Saab 99 rusted out in '94

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misha
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Re: Battery charging question.

Post by misha » Thu Mar 26, 2020 4:05 pm

Why avoiding the battery terminal?
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

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jreed
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Re: Battery charging question.

Post by jreed » Thu Mar 26, 2020 4:14 pm

Some say to connect the ground wire to the body as the second connection to avoid creating a spark right at the battery, which could have hydrogen gas near it.
1997 855 GLT (Light Pressure Turbo) still going strong. Previous: 1986 240 GL rusted out in '06, 1985 Saab 900T rusted out in '95, 1975 Saab 99 rusted out in '95, 1973 Saab 99 rusted out in '94

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misha
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Re: Battery charging question.

Post by misha » Thu Mar 26, 2020 4:27 pm

That's only in case if you need to jump start the car.
It's recommended....not necessary.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

rguzz
Posts: 395
Joined: Wed Oct 07, 2015 8:41 am
Year and Model: 1996 850 turbo
Location: VA
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rguzz

Re: Battery charging question.

Post by rguzz » Thu Mar 26, 2020 5:12 pm

I'm actually trickle charging. Somehow, I feel more comfortable not using both battery posts for that purpose, but can't say about the science behind that thinking. BTW, okay to trickle charge leaving both battery cables connected, charger clip to the positive battery post, negative to the bolt on the chassis? Should be, right?

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misha
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Joined: Sun Dec 07, 2008 4:09 pm
Year and Model: '97 850 2.5 20v
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Re: Battery charging question.

Post by misha » Thu Mar 26, 2020 5:30 pm

If you're charging the battery in the car with terminals connected....you need to remove the cell's caps on top of the battery.
When you finished with charging,allow battery to cool down for about 2 hours,replace the caps and you're done.

You can connect the charger directly on terminals,but make sure that you turn on and turn off the charger from power supply
BEFORE you connect and disconnect the charger clamps.

You can also do the charging in your way too.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

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