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).
Data sheet showing cadmium readings for various types of battery cells.
| Identifier | ExFiles\Box 44\5\ Scan018 | |
| Date | 1st November 1927 | |
| X4049 CADMIUM READINGS. Type of cell. | Terminal P.E. | + Reading. | - Reading. | Weakness. | Density. | Condition. Exide MA3. | 2.45 | 2.40 | -.05 | - | 1250 | Fully charged & charging. FA.11. | 2.55 | 2.30 | -.25 | + | 1210 | Nearly " " Young. | 2.65 | 2.45 | -.20 | O.K. | 1300 | Fully charged & charging. " | 2.55 | 2.45 | -.10 | - | 1300 | Immediately after switching off charge. Glass cell. | 2.45 | 2.40 | -.05 | - | 1270 | Fully charged & charging. " | 2.45 | 2.30 | -.15 | + | 1100 | " " with weak acid Exide EX4. | 2.40 | 2.45 | +.05 | - | 1250 | Fully charged & charging. " | 2.35 | 2.30 | -.05 | - | 1120 | " " with weak acid Std. P & R.{Sir Henry Royce} | 2.80 | 2.40 | -.40 | O.K. | 1260 | Fully charged & charging. Exide. | 2.55 | 2.45 | -.10 | O.K. | 1290 | " " " P & R.{Sir Henry Royce} H.T. | 2.65 | 2.40 | -.25 | O.K. | 1250 | " " " Exide 6 XL3-3. | 2.65 | 2.40 | -.25 | O.K. | 1270 | " " " FA.11. | 2.70 | 2.45 | -.25 | O.K. | 1215 | " " " Oldham. | 2.60 | 2.40 | -.20 | O.K. | 1275 | " " " Fuller. | 2.65 | 2.45 | -.20 | O.K. | 1270 | " " " Std. P & R.{Sir Henry Royce} | 1.70 | 2.00 | +.30 | - | 1120 | Discharged & discharging. Exide. | 1.75 | 1.95 | +.20 | + | 1150 | " " Exide 6 XL3-3 | 1.75 | 1.95 | +.20 | + | 1130 | " " Exide 6 RR.5. | 1.75 | 1.95 | +.20 | + | 1150 | " " Exide 6 XL3-3. | 1.50 | 1.90 | +.40 | + | 1230 | On high rate discharge .100 ohm. 1.11.27. | ||