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).
Table comparing performance data and weights for different battery types.
| Identifier | ExFiles\Box 58\4\ Scan104 | |
| Date | 22th October 1933 guessed | |
| at the 10 hour rate and 20 hour rate | BATTERY MAKE AND TYPE | AVERAGE CURRENT TO 8 VOLTS AND TIME | AVERAGE AMPERE MINUTES TO 8 VOLTS | AVERAGE DISCHARGE FOR 5 MINS TO 8 VOLTS | 10 HOUR-RATE | 20 HOUR-RATE | |---|---|---|---|---|---| | AGENITE 1 PLATE | 109 | 1970 | 390 | 60.0 | 70.0 | | AGENITE 9 PLATE | 102 | 1440 | 290 | 50.0 | 57.5 | | EXIDE 11 PLATE | 103 | 1660 | 330 | 65.0 | 72.0 | | EXIDE 9 PLATE STANDARD | 98 | 1480 | 295 | 56.0 | 64.0 | | G III | 89 | 975 | 195 | 57.0 | 64.0 | The weight of each battery complete is Exide 7 Plate 81 lbs Exide 9 Plate 74 lbs Exide 11 plate 75 lbs. Dagenite 9 plate 74 lbs and Dagenite 11 plate 76 lbs. PTO. | ||