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).
Extract discussing the effect of cold temperatures on battery capacity and recommending the use of larger batteries for the US market.
| Identifier | ExFiles\Box 48\3\ Scan113 | |
| Date | 3rd June 1920 | |
| X4211 Extract from Oy5/G3.6.20. X.664. RE BATTERIES. X.3654. X.607. ---------- X.3619. X4304 X.3778. X.4211. We shall be particularly interested in the results of your temperature tests on batteries, since we have received information here to the effect that at/ten below zero, or some such figure, the capacity of a battery is reduced fifty percent and the internal resistance largely increased, which militates seriously against starting in the wintertime. We should recommend, therefore, that, to help us, your tests on batteries should be carried to temperatures of at least ten below zero, representing possible actual running conditions in this country. X.4211. From consideration of the reduced capacity of the smaller Chloride battery, it appears to us that for the United States at least it will be necessary to use the larger batteries because of the winter driving conditions. | ||