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).
Service and performance log for battery number 75.
| Identifier | ExFiles\Box 38\5\ Scan349 | |
| Date | 13th November 1923 | |
| X/3898 BATTERY RECORD. Battery No. 75. Battery P & R BDL1/2. X.3898. Date. | Service on. | If on car miles run. | If on test notes re use. | Total miles run. | Remarks re performance. 5.2.22. | 6-EX. Temporarily. | - | - | - | O.K. 1.12. | Waiting car. | - | - | - | - 1.12.22 | Bench tests. | - | L.R. discharge. | - | Rather poor. 76% of capacity. 4.1.23. | Duty. | - | - | - | - 15.3.23. | On School Car 40/50. Temporarily. | 1000 | - | 1000 | No trouble. 11.5.23. | Still on School car. 7-LW. | - | - | - | Reported faulty. 15.5.23. | Off School car 7LW. | - | - | - | - 28.5.23. | Bench test. | - | L.R. discharge. | - | Fair. 7.6.23. | Bench test. | - | H.R. discharge. .100 ohm. | - | Good. Readily gave over 100 amps. for 12 mins. 2.7.23. | Duty. | - | - | - | - 13.11.23. | Put in E.M.S. | - | - | - | - | ||