Battery Basics
|
17 of 33
|
|
|
SPECIFIC
GRAVITY OF ELECTROLYTE
Specific
gravity means exact weight. A "Hydrometer" or a "Refractometer"
compares the exact weight of electrolyte with that of water. Electrolyte
in a charged battery is stronger and heavier than electrolyte in a discharged
battery. By weight, the electrolyte in a fully charged battery is about
36% acid and 64% water. The specific gravity of water is 1.000, and
the specific gravity of sulfuric
acid is 1.835, which means the acid is 1.835 times heavier than the
water. The battery electrolyte mixture of water and acid has a specific
gravity of 1.270 and is usually stated as "twelve and seventy."
|