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).
Log sheet recording data from multiple battery charging cycles.
| Identifier | ExFiles\Box 54\1\ Scan136 | |
| Date | 3rd November 1926 | |
| -3- Date. (13) Third charge equivalent to average current of 6.0 amperes for 18.0 hours. i.e. ampere-hours = 108.0 (Date: 3-11-26 to 4-11-26) (14) Cell densities. (1) 1275 (4) 1275 (2) 1275 (5) 1275 (3) 1275 (6) 1275. (15) Initial amperes = 112.5 Temp. = 18°C Time to 104 amperes: -13.8 mins. " " 100 " : 16.5 " " " 90 " : 18.7 " " " 80 " : 20.0 " (Date: 5-11-26) (16) Fourth charge equivalent to average current of 6.0 amperes for 17.5 hours. i.e. ampere-hours = 105.0 (Date: 5-11-26 to 8-11-26) (17) Ampere-hours realised up to a point where record takes a sudden turn down :- 66.0 Temperature :- 18°C (Date: 10-11-26) (18) Fifth charge equivalent to average current of 6.0 amperes. for 18.0 hours i.e. ampere-hours :- 108.0 (Date: 10-11-26 to 11-11-26) | ||