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).
Chart recording the electrical characteristics of an Exide TR battery during a charging test.
| Identifier | ExFiles\Box 54\2\ Scan132 | |
| Date | 9th July 1926 | |
| 9-7-26 Exide TR {Capt. F. W. Turner - Finance} 75 a.h. 100 lbs charged on a fixed PD of 17 volts with a .25w resistance in series. Average amperes = 6.36 Hours = 7.8 Ampere hours = 50.4 .516 1.80w REG'D. {John DeLooze - Company Secretary} TRADE MARK 'MC COURT' | ||