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).
Electrical experimental record sheet tracking battery mileage and test results.
| Identifier | ExFiles\Box 54\5\ Scan137 | |
| Date | 9th September 1930 | |
| ELECTRICAL EXPERIMENTAL RECORD SHEETS. XNO:- 3839 SR Battery (179) Page 2 Date on. Location. Date off. REMARKS. Miles reading start. Miles reading finish. Miles covered. Total miles. 5-1-29 | 8EX | 21-1-29 | | 8606 | 9173 | 567 | 14,350 21-1-29 | E.M.S. | 10-12-29 | | | | | 13-12-29 | Bench Tests | 14-12-29 | results poor Report JD{J. Draper - Frames}#5 13-12-29. 14-12-29 | E.M.S. | 14-8-30 | | | | | 14-8-30 | M.S. | | | | | | No further record kept. B.g. 9-9-30 | ||