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 recording a discharge test for a 6-volt monobloc battery.
| Identifier | ExFiles\Box 168b\3\ img123 | |
| Date | 6th January 1927 | |
| 6-1-27 185/6 P.R.&B.D.H//-394. (6 volt monobloc) 75 a.h. 107 lbs Average amperes = 6.34 Hours = 8.5 Ampere hours = 53.9 508 1.80w | ||