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Old 10-19-2011, 06:13 PM   #1
dahur
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Join Date: Aug 2010
Location: Alamogordo, NM
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Default How fast does your 36v pack self discharge?

I already know I have one bad cell in one of my T-105's.
I was just wondering how much faster mine are self discharging, than a completely healthy pack.

An hour after taking a full charge it settles on 38.2, sometimes 38.3
12 hours later it's sitting on 37.8, and 6 hours after that, it's 37.7
24 hours after being charged it's still on 37.7
I wish my volt meter had another digit. I don't know if it's 37.79 or 37.70
I'm looking for another 2008 battery that's in good shape.
6.3
6.3
6.3
6.3
6.3
6.2

All D8 3 1/2 years old
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Old 10-19-2011, 06:52 PM   #2
Coltf1991
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Default Re: How fast does your 36v pack self discharge?

If my memory serves me right, your pack will lose 1% everyday it's left untained.
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Old 10-19-2011, 07:36 PM   #3
kernal
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Default Re: How fast does your 36v pack self discharge?

I've been out of town so had a cart thats been sitting for 11 days. Pack(6 D9's) reads 37.8. Can't measure to hundredths on my DVM either. As I recall, Trojan says their batteries will discharge about 4% a week. If we assume a full pack starts at 38.2 then after a week they would be at 96% or 38.05 if my math is correct. Outside temp will probably affect these numbers. In any case, your batteries are low compared to mine and a weak cell could account for this.

Good, but technical, reading here: http://www.trojanbattery.com/pdf/TRJ...UsersGuide.pdf

and here:http://www.trojanbattery.com/Battery...e/Testing.aspx if you're interested.
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Old 10-19-2011, 08:37 PM   #4
dahur
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Default Re: How fast does your 36v pack self discharge?

Thanks for the comparison.
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