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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...
MEXICOWANDERER's avatar
MEXICOWANDERER
Explorer
May 27, 2013
I adjust 1.280 SG down to 1.265 for average temps near 100. I have never heard of OEM using 1.300 except for polar applications.

At 25C 1.300 SG will eat a battery 20% faster than 1.280 acid.

Maybe I read this wrong.

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