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 listing and assessing various battery models, noting the poor performance of a U.S.A. model.
| Identifier | ExFiles\Box 168b\2\ img060 | |
| Date | 1st September 1921 | |
| EFC5/T8.9.21 (extract) -2- Contd. Exides 6BXE6 and 6BXE5 (previous to modifications) C.A.V. and Lucas celluloid batteries, Tudor special, Willard S.J.R.27, De Martis, C.A.V.Willard 12XR3 and P & R H.D.E.13. The U.S.A. 6LXR9-1 battery was distinctly bad, as also found by Mr. Olley, our present standard with modifications being considerably better than this one. EFC. R.R. 1354. 1m D/S.H. 1A 10-12-36 G.L. 1867 | ||