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).
Instructions on battery discharging and maintenance.
| Identifier | ExFiles\Box 26\2\ Scan159 | |
| Date | 1st August 1919 guessed | |
| -9- A battery must never be allowed to continue discharging when the voltage of any cell has fallen below 1.8 ( except momentarily for the purpose of tracing a faulty cell as described on p.12 or when desired to store or despatch battery unfilled as described on p.1M.) Such a discharge may occur if there is an earth in the wiring system or if the ignition switch be left on in error and the primary platinum contacts happen to be left in contact. Always, when taking leave of the car, notice that the ammeter does not show any discharge current. | ||