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 re-test of an Exide battery from chassis 25MC.
| Identifier | ExFiles\Box 70\3\ scan0069 | |
| Date | 9th December 1926 | |
| X.8783/b 9.12.26. RE TEST ON EXIDE BATTERY FROM CHASSIS 25MC. Battery when received required badly topping up. Acid was approx. 1" below the plates. Cells Nos. 1, 5 and 6 were low in voltage and shewed negative weakness on the cadmium. When fully charged S.G. is correct. On low rate discharge it gave 40 ampere-hours. and same 3 cells shewed negative weakness. Further charged and given a high rate discharge the initial amperes were 109.0. Time to 104 amperes = 7.0 mm. " " 100 " = 9.0 mm. " " 90 " = 10.0 mm. " " 80 " = 10.7 mm. Same 3 cells shewed negative weakness and discharged very quickly due to the negatives being faulty. It seems evident that this battery has been wrongly treated by either allowing it to stand in a discharged condition or plates have been explosed due to the acid level being left low. EFC/GJ. | ||