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 for an Exide battery, tracking mileage.
| Identifier | ExFiles\Box 58\3\ Scan187 | |
| Date | 20th April 1931 | |
| ELECTRICAL EXPERIMENTAL RECORD SHEET IXNO 4642E. Exide (6XL3-4-7) Battery (233) Date on. Location. Date off. REMARKS. Miles ref.. Start. Miles Finish. Miles covered Total miles. 21-7-30 GLN60 - Received charged 5291 6583 1292 1292. 19-9-30 124TV 18-10-30 3074 3471 397 1,689 18-10-30 u 29-11-30 3471 3768 297 1,986 29-11-30 u 2-1-31 3768 4235 467 2,453 2-1-31 u 4235 No further record kept. G.J. 20-4-31 | ||