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 the testing and usage of a Sandwich Battery.
| Identifier | ExFiles\Box 54\1\ Scan320 | |
| Date | 19th April 1926 | |
| III ELECTRICAL EXPERIMENTAL RECORD SHEETS X.&No: - 46175 Sandwich Battery S2/155) E+ Page 3. Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered. | Total miles. --- | --- | --- | --- | --- | --- | --- | --- 16-2-27 | M.S. | 25-6-28 | | | | | 13,377 25-6-28 | Bench Tests | 28-6-28 | Report JC111 28.6.28 | | | | 28-6-28 | M.S. | 7-1-29 | No 1 cell failed P&R Replaced by P&R from S4. which was originally in 3Y. Report JC141 12.11.28. | | | | 7-1-29 | Used for spares | | 40 months life test. | | | | 19.4.26. | ||