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 of terminal potential difference vs. rate of charge for Paragon and Exide 6-volt batteries at various temperatures.
| Identifier | ExFiles\Box 168b\3\ img075 | |
| Date | 19th June 1930 | |
| TERMINAL P.D. RATE OF CHARGE (AMPERES) CURVES OF THE SUSTAINED P.D. ON A 6 VOLT 'PARAGON' BATTERY AND A 6 VOLT 'EXIDE' 3MRB-12EL BATTERY TAKEN AT VARIOUS RATES OF CHARGE WITH A FIXED TEMPERATURE & THE BATTERY IN A FULLY CHARGED CONDITION Curve Labels: PAR 4°C 39°F EXIDE 4°C 39°F PAR 11°C 52°F EXIDE 11°C 52°F PAR 14°C 58°F EXIDE 14°C 58°F PAR 15.5°C 60°F EXIDE 15.5°C 60°F H.J.S / 19.6.30 | ||