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 curve and performance data for a 6-volt monobloc battery.
| Identifier | ExFiles\Box 168b\3\ img125 | |
| Date | 14th January 1927 | |
| 14-1-27 185/6 P&R BDH11-394 (6 volt monobloc) 75ah 107drs. Average amperes = 6.33 Hours = 8.6 Ampere hours = 54.4 .508 1.80w. | ||