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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 24, 2013
12.78v predicted. Pretty close given likely error in hydrometer and volt meter. Even more so if it had settled slightly at 24 hours.

BFL what kind of voltmeter and hydrometer do you use?

Jim

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