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).
Failure analysis report on an Exide battery cell after a bench life test.
| Identifier | ExFiles\Box 54\1\ Scan346 | |
| Date | 13th August 1929 | |
| E.F.B. J.D.21. X46175. 13-8-29 X46175. (154) Re Failure of Exide cell in S1 Batt No 6 cell has failed in this battery after having been on our Bench Life test 29 months, & ran 13,336 miles. Failure was due to the stretching of the positive plates shorting on the negative bus bar. The negative plates were good. The positive plates had lost a good amount of paste & were very weak mechanically. The wood separators were very poor being eaten through badly although the ebonite separators were good. The depth of sediment was about 1/2 inch. GJ | ||