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).
Battery test report detailing the second charge, with cell readings, weight, and temperature measurements.
| Identifier | ExFiles\Box 168b\3\ img026 | |
| Date | 7th January 1930 | |
| -2- (6) Second charge:- Charge given:- 110 ampere hours at 7 amperes. (7) P & R | Exide | Cell No. | 1 | 2 | 3 | 4 | 5 | 6 | |---|---|---|---|---|---|---| | Density | 1280 | 1280 | 1280 | 1280 | 1280 | 1280 | | Voltage | 2.65 | 2.65 | 2.65 | 2.65 | 2.65 | 2.65 | | +ve to cadmium | 2.45 | 2.45 | 2.45 | 2.45 | 2.45 | 2.45 | | -ve to cadmium | -.2 | -.2 | -.2 | -.2 | -.2 | -.2 | (8) Emptying and refilling, or adjusting densities and levels. (9) Applicable only if battery comes in charged. | Cell No. | 1 | 2 | 3 | 4 | 5 | 6 | |---|---|---|---|---|---|---| | Density | | | | | | | | Voltage | | | | | | | | +ve to cadmium | | | | | | | | -ve to cadmium | | | | | | | (10) Weight of battery 57 lbs. 8 ozs. P & R } 111.25 lbs. 53 " 12 " Exide } (11) Battery temperature :- 18°C. 64°F.{Mr Friese} Ampere-hours realised up to point where record takes sudden turn down :- 61.5 Handwritten on right: Date. 1-1-30 to 3-1-30 7-1-30 | ||