From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Working rules for battery maintenance, detailing weekly and monthly checks.
| Identifier | ExFiles\Box 26\2\ Scan201 | |
| Date | 10th August 1920 guessed | |
| -2- WORKING RULES. WEEKLY:- INSPECT LEVEL OF ACID. KEEP TO ½" ABOVE PLATES BY THE ADDITION OF PURE DISTILLED WATER ONLY. MONTHLY:- CHARGE BATTERY UNTIL ALL PLATES GAS FREELY. TEST SPECIFIC GRAVITY OF LIQUID IN ALL CELLS, THIS SHOULD BE 1270 to 1290: IF NOT UP TO THIS, SEE DETAILED INSTRUCTIONS FOR SPECIAL TREATMENT, p.10. KEEP THE TOP OF THE BATTERY SCRUPULOUSLY FREE FROM ACID, DIRT AND ALL FOREIGN SUBSTANCES. KEEP THE TERMINALS CLEAN, THE CONNECTIONS AND VENT PLUGS TIGHT AND THE VENT PLUG PASSAGES CLEAR. KEEP ALL METAL WORK COVERED WITH VASELINE, BUT DO NOT PUT VASELINE ON INSULATING COMPOUND OR CABLE COVERING. KEEP METAL ARTICLES AWAY FROM THE TERMINALS AND CONNECTIONS. KEEP THE BATTERY IN A COOL DRY PLACE WHEN NOT IN USE, AND IF FOR A LONG PERIOD, GIVE THE NECESSARY FRESHENING CHARGES. | ||