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).
Progress report on the life test of a 20 HP size battery.
| Identifier | WestWitteringFiles\L\July1924-September1924\ Scan10 | |
| Date | 22th September 1924 | |
| EFC3/T22.9.24. -2a- Contd. One, however, such battery is included in our set of seven 20 HP. size batteries on the life test, as described in our previous report, and has been in this set for six months, in addition to which it has occasionally been subjected to observed low and high rate capacity tests. It is anticipated that this battery will not fail for a consider- able time - it is still at present in good working order. | ||