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 high rate discharge curves for an Exide 6XCM R 13-IM battery.
| Identifier | ExFiles\Box 164\4\ img285 | |
| Date | 16th March 1936 | |
| BATTERY VOLTS CELL VOLTS CADMIUM TO POSITIVE (VOLTS) CADMIUM TO NEGATIVE (VOLTS) SPECIFIC GRAVITY 11.5 1.8 2.0 0.25 1260 10.5 1.6 1.8 0.20 1240 9.5 1.4 1.6 0.15 1220 8.5 1.2 1.4 0.10 1200 7.5 1.0 1.2 0.05 1180 MINUTES DISCHARGE 0 5 10 15 20 25 BATTERY VOLTS CELL VOLTS CADMIUM TO POSITIVE " " NEGATIVE SPECIFIC GRAVITY EXIDE 6XCMR 13-IM1 HIGH RATE DISCHARGE CURVES EXT. RES. 0.1 OHMS CAPACITY 36 AMP. HRS. 16.3.36 | ||