Freezing Temperature of Electrolyte
The freezing temperatures of electrolyte in the Delco-Light batteries depends upon the specific gravity of the battery. The Delco-Light battery fully charged, with a specific gravity of 1.220, should not freeze above a temperature of 30 degrees below zero. Since, however, the freezing point rises very rapidly with a decrease in specific gravity, special care should be taken to keep batteries charged when temperatures below zero are encountered. The following table shows freezing temperatures of several different gravities of electrolyte.
| Specific Gravity | Freezing Point |
|---|---|
| 1.100 | 19° F. above zero. |
| 1.150 | 5° F. above zero. |
| 1.175 | 6° F. below zero. |
| 1.200 | 16° F. below zero. |
| 1.220 | 31° F. below zero. |
At the temperature given, the electrolyte does not freeze solid, but forms a slushy mass of crystals, which does not always result in jar breakage.