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).
Blueprint graph showing the typical continuous discharge curve for an STXR9A battery.
| Identifier | ExFiles\Box 164\3\ img036 | |
| Date | 2nd July 1937 guessed | |
| JOSEPH LUCAS LTD. FORMANS ROA STXR9A B CONTINUOUS DISCHA TYPIC P.D 13 12 11 10 ELECTROLYTE TEMPERATURE 78°F.{Mr Friese} SP.{Mr Spinney} GR.{George Ratcliffe} BEFORE 1.295 AT 60°F.{Mr Friese} HOURS DISC 0 1 2 3 4 5 6 7 D/84 | ||