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).
Note regarding battery leakage between cell terminals and retaining features in any new layout.
| Identifier | ExFiles\Box 58\3\ Scan172 | |
| Date | 4th February 1931 guessed | |
| J.D.115. 2 evidence of leakage taking place between the cell terminals where we get a nominal 8 volts. If the layout of the battery is changed we should retain the features that and are contained in our present battery which go to its improvement. | ||