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).
Calculation for the fifth charge equivalent to average current, resulting in ampere-hours.
| Identifier | ExFiles\Box 38\5\ Scan310 | |
| Date | 17th April 1928 | |
| (4) Contd. Date: 17-4-28 to 20-4-28 (12) Fifth charge equivalent to average current of 5.0 amperes for 24 hours i.e. ampere-hours = 120.0 [Watermark/Stamp text:] MVDEVA-CHOMTEA 180 DICKINSON BOND | ||