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).
Performance tests and comparisons of Exide, C.A.V. Willard, and P & R batteries.
| Identifier | WestWitteringFiles\I\August1922\ Scan33 | |
| Date | 8th August 1922 | |
| Contd. -2- EFC1/T8.8.22. Exide Batteries - 12XRZ. The curves for batteries Nos.89/93 were those taken during the routine tests of these batteries. These batteries have not yet, like the C.A.V.Willard, had the opportunity of doing a large number of miles on a Goshawk chassis. De Martis. A high rate test of this was taken twice with, as will be seen, an improvement the second time, but it seems poor as compared with the others. As regards the low rate ampere hour discharging of these batteries, both the C.A.V.Willard and Exide appear to be capable of giving round about 40 to 45 ampere-hours when discharging at 10 amperes, and rather over 45 ampere-hours when discharging at a lower rate of about 7 amperes. There does not appear much to choose between the C.A.V.Willard and the Exide. We think, however, that the final form of the P & R battery will be superior to either. EFC. | ||