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).
Graph chart detailing a battery discharge test with calculated results.
| Identifier | ExFiles\Box 38\5\ Scan372 | |
| Date | 3rd April 1924 | |
| X.3398 END OF CHART RECD. TRADE MARK MEGER CHING 21 3-4-24 130/P&RTBDII-6 95lb 80a.h. Average amperes = 6.69 Hours = 8.66 Ampere hours = 57.9 P/ot .61 1.80w. 157 REPAIRED | ||