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).
Comparison of three battery types: Exide, C.A.V., and a specially made P & R.
| Identifier | ExFiles\Box 38\5\ Scan255 | |
| Date | 23th October 1922 | |
| Contd. -2- EFC4/T23.10.22. whereas the Exide and the C.A.V. are their standard articles, the P & R has been specially made to dimensions to suit the space available and will actually be about 5 ampere hours greater in lighting capacity than its two rivals. It will be instructive to see which of the three batteries is the most satisfactory under running conditions. EFC. | ||