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Unread 12-08-2013, 20:00
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Al Skierkiewicz Al Skierkiewicz is offline
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Re: BatteryBeak: Utility of making internal resistance and state of charge measuremen

Don,
There doesn't seem to be a standard which is why the curves for the two legal batteries are similar but the ratings are different. If you overlay them the differences are minimal but the values are different. In looking at the curve linked in Ether's post, you can see all the curves nose diving to 8 volts but many of the curves are truncated so as to not confuse the customer. The MK VLRA Technical Manual specifies amp hour based on 1.75 volts per cell.
"Ampere Hour Capacity at 20, 6, 3 and 1 Hour Rates:
Ampere hour capacity is a unit of measure that is calculated by
multiplying the current in amperes by the time in hours of discharge
to 1.75 volts per cell. These are nominal or average ratings."
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Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
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Storming the Tower since 1996.

Last edited by Al Skierkiewicz : 13-08-2013 at 07:07.