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HiTech's avatar
HiTech
Explorer
May 23, 2013

Checking hydrometer accuracy with charged battery voltage

Is it true that: Specific Gravity = Cell Open Circuit Voltage - 0.845? Could one average the specific gravity readings across cells in a battery, and use this formula to check the accuracy of th...
HiTech's avatar
HiTech
Explorer
May 27, 2013
It seems like a lot of the hydrometers available could easily be .1 or more off just fom posts here. If I could find a $15 one that was half way accurate until I get a Freas I'd be happy but it seems really hard to get info on accuracy or repeatability of the moderately priced units. Especially anything I can find locally.

Jim

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