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).
Record of battery charging and discharging tests, including measurements of current, time, and weight.
| Identifier | ExFiles\Box 41\2\ Scan110 | |
| Date | 8th June 1920 | |
| R.R. 199 (250T) (SD676 19-7-17) Mc 180865 -2- (6) Second charge :- Date:- Amperes from to hours. Amp.hours. 10 4.0 8.0 4 40 28.5.20 10 8.0 12.0 4 40 29.5.20 10 8.0 5.30 9.5 95 31.5.20 10 8.0 8.0 12 120 Total 295 (7) Emptying and re-filling, or adjusting densities and levels. O.K. (7a) Density readings for battery received charged (1) (4) (2) (5) (3) (6) (8) Continuation of charge. O.K. (9) Weight of battery 187lbs. 8 ozs. 7.6.20 (10) Discharge at 12 amperes to 10.5 volts. Total hours :- 9.17 Ampere hours realised :- 110.04 8.6.20 | ||