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  • Good morning! I now have my hydrometer and 12v charge controller so i am finally ready to test my batteries! i was wondering if i need to fully charge the batteries before testing them with the hydrometer? or if i can test them at any voltage?
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    DerpsyDoodler
    You can test them at any voltage through-out the charging process. Wear gloves and have a rag and some water close by to rinse/wipe the hydrometer after each use. Be very careful. I recommend eye protection, as well. While doing this you're exposed to dangerous chemicals and fumes. Try not to spatter or splash any electrolyte around.
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