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).
Listing the weights in pounds (lbs) for various types of batteries.
| Identifier | ExFiles\Box 48\3\ Scan034 | |
| Date | 7th March 1921 | |
| X.4206 95173. 7.3.21. EFC. {E. Fowler Clarke - Electrical Engineer} FD. {Frank Dodd - Bodies} 47. X.664 - BATTERIES X.979. X.1723. X.4206. X.4288. X.3629. WEIGHTS. U.S.A. Exide 85.5 lbs. Special Chloride with pitched-in cells. 79.5 lbs. De Martis. 76.5 lbs. R.R. Tudor. 90.0 lbs. Complete with acid. L.F. | ||