 What Is Acceptable Battery Drain On 850?, Battery Electrical Troubleshooting |
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| What Is Acceptable Battery Drain On 850?, Battery Electrical Troubleshooting |
 Aug 27 2008, 10:53 AM
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#1
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Newbie Group: Members Posts: 1 Joined: 27-August 08 Member No.: 47,422 Status:  Location: Atlanta, GA, USA Drives: 1993 Volvo 850 GLT  |
I have a 1993 Volvo 850 GLT. The battery drains after a few days of not driving. I put an amp meter in line with the negative battery cable and it showed 79mA. I started pulling fuses and when I pulled #7 (Radio/Amp) the draw dropped to 27mA. I continued pulling and when I pulled #15 (Radio, Courtesy Lamps, Door Warning, etc), the amperage dropped to 9mA. All other fuses had no real affect on the draw.
It appears I have a radio issue and I will leave #5 pulled until I figure it out. #15 has more safety options with it, so I will leave it in for now. My question to the board is, "What can I expect the standard draw on a sitting battery to be?" Is 9 mA acceptable? 27mA? Thanks for your assitance- 740ATL |
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Aug 27 2008, 09:48 PM
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#2
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 Veteran  Group: Admin Posts: 7,248 Joined: 1-March 05 Member No.: 3,464 Status: Location: Kuala Lumpur, MALAYSIA Drives: 1996 Volvo 855 T5 FWD, 1989 Honda Civic 2-Door |
QUOTE(740atl @ Aug 27 2008, 11:53 PM) My question to the board is, "What can I expect the standard draw on a sitting battery to be?" Is 9 mA acceptable? 27mA? [right][snapback]90295[/snapback][/right] I am not sure about the static draw. But i do know that a perfectly fully charged battery is supposed to hold a pole voltage charge of 12.72 Volts, at an ambient temperature of 25 degrees Celsius or 77 degrees Fahrenheit. And normally, if the charge is less than 8V, (specifically 7.2V) the starting would be very difficult. Lemme check further on the static draw. |
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Aug 27 2008, 10:18 PM
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#3
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 Senior  Group: Members Posts: 488 Joined: 14-May 08 Member No.: 42,436 Status: Location: usa Drives: 1994 volvo 850 turbo |
you found the answer to your draw issue, mabe not in detail, but on the nail. Seems some 850's have issues with the radio related wireing. My wireing didnt kill the battery, but slowly killed speakers, headunits and plugged items. Power surges, snaps, and wiered pulses. I have to do a stand alone wire system for the radio. Look in the Hanes manual at the circut list. even the speakers have a circut link in the list. Do you have the stock radio in or a aftermarket one? Do you hear short activity in the audio? (snaping, humming, hissing)
oh and if you dont mind me asking, how did you find this forum? |
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Aug 27 2008, 10:20 PM
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#4
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Senior Group: Members Posts: 488 Joined: 14-May 08 Member No.: 42,436 Status: Location: usa Drives: 1994 volvo 850 turbo |
oh and your from my home town....sigh....im home sick. I love the Dirty Dirty. Miss my hotlanta! :57:
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Aug 28 2008, 03:02 AM
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#5
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Expert Group: Members Posts: 533 Joined: 17-June 06 Member No.: 15,939 Status: Location: Victoria, Australia Drives: '88 240 Wagon, '95 850 T5 Wagon, '00 Nissan ST Twin cab ute. |
QUOTE(ampangbear @ Aug 28 2008, 01:48 PM) And normally, if the charge is less than 8V, (specifically 7.2V) the starting would be very difficult. [right][snapback]90327[/snapback][/right] Normally or otherwise - if the voltage between battery poles is anywhere near as low as 8 volts, starting will be a slight tad more than difficult, it will actually be quite impossible. |
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Aug 28 2008, 05:16 AM
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#6
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Veteran Group: Admin Posts: 7,248 Joined: 1-March 05 Member No.: 3,464 Status: Location: Kuala Lumpur, MALAYSIA Drives: 1996 Volvo 855 T5 FWD, 1989 Honda Civic 2-Door |
:)
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Aug 28 2008, 05:47 AM
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#7
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Veteran Group: Admin Posts: 7,248 Joined: 1-March 05 Member No.: 3,464 Status: Location: Kuala Lumpur, MALAYSIA Drives: 1996 Volvo 855 T5 FWD, 1989 Honda Civic 2-Door |
QUOTE(740atl @ Aug 27 2008, 11:53 PM) My question to the board is, "What can I expect the standard draw on a sitting battery to be?" Is 9 mA acceptable? 27mA? [right][snapback]90295[/snapback][/right] Based on some of the calculation in VADIS, the maximum permitted standby current should be around 32.2mA The formula is as follows: *Ah / 504 h / 4 = I mA where * = Battery capacity I = Standby current |
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