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).
Test log sheet detailing battery charging cycles, cell densities, and performance data.
| Identifier | ExFiles\Box 54\2\ Scan140 | |
| Date | 8th February 1924 guessed | |
| (3) A Contd. Date (13) Third charge equivalent to average current of 6.0 amperes. for 20. hours. i.e. ampere-hours = 120 12-7-24 to 15-7-24 (14) Cell densities. (1) 1290 (4) 1290 (2) 1290 (5) 1290 (3) 1290 (6) 1290 15-7-24 (15) Initial amperes = 110.0 Temp:- 18.0°C. Time to 104 amperes:- 11.5 mins. " " 100 " 16.6 " " " 90 " 21.9 " " " 80 " 23.7 " 15-7-24 (16) Fourth charge equivalent to average current of 6.0 amperes. for 20.0 Hours i.e. ampere-hours = 120.0 15-7-24 to 17-7-24 (17) Ampere hours realised up to a point where record takes a sudden turn down :- 80.6 Temperature :- 18.0°C. 18-7-24 (18) Fifth charge equivalent to average current of 6.0 amperes for 20.0 hours i.e. ampere-hours:- 120.0 19-7-24 to 22-7-24 | ||