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).
Observations of battery life in experimental cars equipped with an auto switch.
| Identifier | WestWitteringFiles\S\March1928-May1928\ Scan003 | |
| Date | 2nd March 1928 guessed | |
| -3- Contd. We are saying this from observation of the topping up on the experimental cars fitted with the auto switch. One might say that the battery would then be living at half rate, in the sense that attention to and deterioration of the battery are both only half as rapid as previously. EFC. | ||