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).
Continued report comparing the internal resistance and voltage of P & R and Exide batteries in a 40/50 system.
| Identifier | ExFiles\Box 51\2\ Scan201 | |
| Date | 14th December 1928 guessed | |
| -2- Contd. Again the P & R battery showed the highest internal resistance, the resulting voltage being higher than that found n the 40/50 system. The Exide voltages also exceed the 40/50 Exide figures. RJA. | ||