[Main 9000 Bulletin Board | BBFAQ | Prev by Date | Next by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos Re: Help with battery drain diagnosis.... Like This Post: - Subscribe to Daily Digest for this Bulletin Board Posted by Ari [Email] (#2847) [Profile/Gallery] (more from Ari) on Tue, 19 Jul 2005 05:26:14 In Reply to: Help with battery drain diagnosis...., Chris M, Tue, 19 Jul 2005 03:46:24 Alert me when someone posts in this thread: Members do not see ads below this line. - Help Keep This Site Online - Signup

I don't know which meter you have, or what the settings are. You will want to be reading milliamps, not amps. If you have other settings on the meter, try milliamps (MA) - probably 200 ma range, if you have one. Typical current drain is about 25 - 35 ma (0.025 - 0.035 amps). Your meter may not read that low on the AMPS range you've picked.

If you did have a current drain killing the battery, it would probably show up as 1 amp or so. A decent battery can source 30 or 50 or 100 ma for weeks without dying.

My guess is that your battery is shot. This is especially true if the battery has gone flat a few times already. Car batteries aren't designed to be completely discharged. Every time the battery goes completely dead, it loses some of its capacity to hold a charge. This leads to it going dead more often, and each one of those kills it some more. It will charge up just fine, but it loses its charge very quickly.

You can try the battery drain test. Every once in a while somebody finds an unusual battery drain. Not often. And if you did find something draining the system, and fixed it, chances are you're going to need to replace the battery anyway if it has gone dead a half dozen times or so.



posted by 192.249....

• Help with battery drain diagnosis...., Chris M, Tue, 19 Jul 2005 03:46:24
  • new device available to help stop dead batteries!!!, gavin, Tue, 19 Jul 2005 21:56:29
    • Only prevents one kind of fault, Ari , Wed, 20 Jul 2005 08:37:28
      • Seems rather expensive..., Chris M, Wed, 20 Jul 2005 09:28:47
  • Re: Help with battery drain diagnosis...., Ari , Tue, 19 Jul 2005 05:26:14 <-- Viewing This Message
    • Thanks Ari, Chris, Tue, 19 Jul 2005 06:20:26
      • Optima = excellent battery, John Fitzgerald , Tue, 19 Jul 2005 12:18:02
        • Thx!....n/m, Chris M, Tue, 19 Jul 2005 12:58:05
      • Ain't clairvoyance, Ari , Tue, 19 Jul 2005 06:47:56
        • meter damage, MrBubble, Tue, 19 Jul 2005 13:29:00
        • I see, Chris M, Tue, 19 Jul 2005 11:48:12
        • I see...., Chris M, Tue, 19 Jul 2005 11:43:45

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