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 showing the discharge curves of two proposed batteries for the Phantom II model.
| Identifier | ExFiles\Box 58\4\ Scan048 | |
| Date | 19th February 1932 guessed | |
| DISCHARGE CURVES OF PROPOSED PHANTOM II BATTERY TAKEN ON ONE 6 VOLT UNIT EXIDE 3-XRR11-1H NATIONAL 3-BDH 11-A VOLTS TIME (MINS.) DISCHARGE CURRENT 185 AMPERES | ||