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).
Page of test readings for various types of electrical cells showing their condition and voltage readings.
| Identifier | ExFiles\Box 44\5\ Scan014 | |
| Date | 26th April 1926 guessed | |
| -2- Contd. Below are a few readings taken on various cells and it will be seen that some show positive weakness and others negative weakness. Type of cell tested. | Condition of cell. | Terminal voltage. | +ive plate >= 2.05 | -ive plate <= 0.25 ----------------------|--------------------|-------------------|--------------------|-------------------- Hart. | Discharged. | 1.80 | 2.0 | .20 Accu-Slem. | Discharged. | 1.80 | 2.05 | .25 Exide MA.3 | Discharged. | 1.80 | 2.10 | .30 Exide BX4. | Discharged. | 1.80 | 2.0 | .20 Multiple Storage. | Reversed. | -1.40 | .95 | 2.3 Exide EXR25. | Discharged | 1.60 | 2.10 | .50 P & R 3A. | Discharged | 1.85 | 1.95 | .10 P & R BDT.11 | Discharged | .06 | .29 | .23 P & R BDT.11 | Discharged | 1.0 | 1.25 | .25 Accu-Slem. | Shorted. | 0 | .10 | .10 Exide SPL. | Discharged High rate.| 1.75 | 2.05 | .80 Exide SPL. | Discharged High rate.| 1.20 | 1.95 | .75 EFC/G.J. | ||