Mailing List flyrotary@lancaironline.net Message #10140
From: Bulent Aliev <atlasyts@bellsouth.net>
Subject: Re: [FlyRotary] Battery 101
Date: Sun, 01 Aug 2004 19:00:57 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Re: [FlyRotary] Battery 101 On 8/1/04 6:39 PM, "Tommy James" <twjames@statesville.net> wrote:

Hi Guys.  
 
Here is a question for those on the list that know about the vagaries of why batteries drain down to 10.2 volts in about 10 days time.  This 12v, 24AH, sealed lead acid battery was new in Oct 03.  It has held a charge(except when I leave a switch on) until now.  I can not find any closed circuits except for the little electronic compass that draws little.
Thanks for any help!
Tommy James<>< (tired of pulling the battery out and bringing it home for recharge…solar charger on order..:-)


Hi Tommy, if you have discharged the battery only once below 10 Volts, most likely the battery has a damaged cell and will not hold charge. Gell batteries will recover from full discharge, but the led acid ones most likely are goners.
You can do a load test after you charge it overnight. If you don’t have a load tester, go to Sears and they will do it. Damaged battery after charge will show 12-13V, but if you put load on it, it will collapse below 10V.
Bulent
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