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).
Test report on a Brisport I Battery after 18,000 miles of running.
| Identifier | ExFiles\Box 63\4\ scan0058 | |
| Date | 22th June 1933 | |
| x6003. Brisport I Battery after running 18,000 miles 22.6.33. On high rate discharge this battery gave a good output, an average discharge of 108 amperes for 18 min 40 sec. There was not any appreciable strain on either the positive or negative plates after this test. Capacity of this battery was found to be 67 ampere hours at the 10 hour rate. The condition of the battery was very good. There was however a slight buckle on the positive plates but there was no signs of any sulphation which may have been responsible for this. The amount of paste in the bottom of the container was almost a negligable amount considering the number of miles travelled and the time the battery has been fitted P.T.O. | ||