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 logging a battery test with mileage.
| Identifier | ExFiles\Box 54\1\ Scan250 | |
| Date | 19th April 1926 | |
| ELECTRICAL EXPERIMENTAL RECORD SHEETS X. & No: - 66175 SJ(172) Battery Page 2 Date on. Location. Date off. REMARKS. Miles reading start. Miles reading finish. Miles covered. Total miles. 15-4-27 12EX 29-4-27 Fuller cell appears leaky. 5008 5291 283 10,835 3-5-27 Cells used as spares. G.D. 19.4.26. | ||