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 results for a battery after 1 year and 7 months of use, including low and high rate discharge data.
| Identifier | ExFiles\Box 168b\3\ img312 | |
| Date | 31th December 1930 | |
| EFE JO110 X.7535 P. 31-12-30 X7535P Tests on PRRRNH/374 Battery 215/6. This battery is now 1 year 7 months old & has run 19,903 miles on the road. On Low Rate Discharge 55.5 ampere hours were realised & all the cells shewed positive weakness. On High Rate Discharge Initial amperes = 109.7 Time to 104 " " = 10.5 min " " 100 " " = 15.2 " " " 93.6 " " = 20.0 " All cells showed negative weakness on this test. Both of the above results are very good & shew the battery to be capable of further service. GJ | ||