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).
Plan to fully charge and test a modified battery over a six-month period.
| Identifier | WestWitteringFiles\F\January1921\ Scan36 | |
| Date | 24th January 1921 | |
| -2- Contd. EFC3/T24.1.21. We will, therefore, now fully charge a complete battery with the latest modifications, e.g. ebonite separators, and two separate cells and stand these for an interval of six months. EFC. | ||