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).
The expected lifespan of batteries under different care conditions.
| Identifier | ExFiles\Box 46\3\ Scan158 | |
| Date | 20th January 1926 | |
| EFC5/T20.1.26. -2- Contd. first charged (as they are by the makers) and that reasonable care is taken with the battery in accordance with the instructions contained in the Instruction Book. we also know positively that these batteries will last for 3 years under the average customer's conditions, or at least for 30 months as an absolute minimum. Any time of lasting less than this, we can only say must be due to want of reasonable treatment and it can easily be the case that with specially careful treatment they may last for four years. EFC. | ||