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).
Cell failure caused by growth bridging across the positive plates.
| Identifier | ExFiles\Box 54\2\ Scan196 | |
| Date | 3rd September 1929 guessed | |
| ID10. 2 & this growth bridging across to the positive plates causing a partial short. This cell has ran 14,767 miles & has been on our bench life test 19 months & is the first failure to occur on the threaded rubber separator cells. H) | ||