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).
Table of test results for various battery cells under different conditions, with a recommendation for testing methodology.
| Identifier | ExFiles\Box 44\5\ Scan017 | |
| Date | 26th April 1926 | |
| Contd. -3- EFC1/T26.4.26. Type of cell Tested. | Condition of cell. | Terminal Voltage. | +ve plate >2.05 | -ve plate <0.25 -------------------|----------------------|-------------------|---------------|---------------- Hart. | Discharged. | 1.80 | 2.0 | .20 Accu-Slem. | " | 1.80 | 2.05 | .25 Exide MA.3. | " | 1.80 | 2.10 | .30 Exide BX4. | " | 1.80 | 2.0 | .20 Multiple Storage. | Reversed. | -1.40 | .95 | 2.3 Exide BXRE5. | Discharged. | 1.60 | 2.10 | .50 P & R.{Sir Henry Royce} 3A. | " | 1.85 | 1.95 | .10 P & R.{Sir Henry Royce} BDT.11 | " | .06 | .29 | .23 " | " | 1.00 | 1.25 | .25 Accu-Slem. | Shorted. | 0 | .10 | .10 Exide SPL. | Discharged high rate.| 1.75 | 2.05 | .30 " | " | 1.20 | 1.95 | .75 In any case where a lot of cells have to be dealt with, the cadmium electrode should be used together with a reasonably sensitive voltmeter, but the indications are of most value when the terminal P.D. is, through discharge or otherwise, on the point of falling below 1.8. EFC. | ||