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 report on Battery No. 26, concluding it is unsuitable due to its weight.
| Identifier | ExFiles\Box 41\2\ Scan128 | |
| Date | 6th October 1920 | |
| X.3711. Extract from EFC3/T6.10.20. X.664. BATTERIES. X.3711. Battery No.26. Multiple Storage. Results for this battery were completely reported in EFC1/T20.8.20, adressed to Bn.{W.O. Bentley / Mr Barrington} R.{Sir Henry Royce} CJ., and EWT. for U.S.A.. This particular battery is in two 6 volt sections, the combined weight of which is double that of an ordinary 12 volt battery and therefore it is not suitable for our car. | ||