On 2005-05-17 snipped-for-privacy@THISyahoo.com said:
>>. I posted on the Volvo forum, but its not as active
>> as this one, so I thought I would post here too.
>> Recent rebuild on this 85 Volvo 240 DL,
>> 300000kms. Auto Trannie, B230F motor. Sedan. 3 spd trannie.
>> The battery goes dead after about 10 hours of not running. Put my
>> multimeter on it, when running the voltage is 14 volts, which
14 V is a bit low. IIRC, my old Civics run 14.3 V, and that little
bit extra is critical to giving the battery a full charge.
>>rules out the alternator. When not running, I can observe
>> the voltage dropping from 12.75 to about 12.30
>> or so. It may go lower, but this occured over
>> about a minute or so after the car was stopped.
>> Amperage drawn when the car is not running is
>> 0.8 to 0.87 Amps, which shouldn't be enough to drain the battery
>>in 10 hours. This was done
>> by removing the positive battery cable, and
>> putting my multimeter between the cable and
>> the positive post.
>> The battery is brand new, and I realize it could
>> be a dud. However, are there any other things
>> I should be checking? Cables appear to be in good
>> shape. The clamps on the posts are good too.
I run a 1 KW solar power set-up using a 24 V, 550 AH storage battery
as my main power source. Before putting a new battery into service,
it is essential to give it a proper initial charge, or service life
The voltage you measure suggests your new battery came to you
seriously self-discharged from sitting on the dealer's shelf. Since
it is probably sealed ("maintenance free"), I recommend using a "smart
charger" to prevent excessive gassing from overcharge, and possible
A properly charged battery may take overnight to drop to 12.6 volts
after the engine is shut off (charge terminated), if not loaded.
Back in the old days, when batteries had cell caps, I never saw a
"new" battery with more than 1/2 charge, specific gravity 1.215. Dry
charged must have a proper forming charge done on it, immediately, or
risk plate destruction due to a chemical process C&D Technologies (a
manufacturer of serious industrial and telephone batteries) calls
"hydration", white crystaline deposits on the plates.
I once monitored battery specific gravity on a new battery installed
without this initial bench-charge, relying on the alternator to bring
it up to full charge with "normal daily driving". Took a month. Not
>800 mA/hr is not normal and may get your battery drained
>sufficiently enough to not start the next day.
There is no "/hr" in the units for electrical current. "800 mA" is
near Mountainair, (mid) New Mexico, USA
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