Griffiths Battery Hydrometer SKU: 463410 MODEL: 61 BH100 Error. try again later You've successfully joined the club $ 12 .23 each Available on orders $50 to $1500. More info × Mitre 10 SAvailable at selected stores. Check your local store for details Variants Tests the specific gravity of the battery fluid. Calibrated graduations for accurate measurement. Features and benefits Checks the charge level of a battery.