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).
Routine treatment report for a car lighting and starting battery, detailing charge and discharge cycles.
| Identifier | ExFiles\Box 52\4\ Scan051 | |
| Date | 3rd June 1929 | |
| X. 4502 ROUTINE TREATMENT OF CAR LIGHTING & STARTING BATTERIES. Date:- 3-6-29 Battery under treatment:- Ediswan XSB 557-1-2 (221) 6-volt units Rated capacity :- 90 ampere-hours. Received charged or uncharged:- uncharged. X.4502 General remarks :- (1) Terminals & Connections. Taper Pillar type Burnt up links. (2) Filling. 1280 SG {Arthur F. Sidgreaves - MD} acid. (3) Standing. 6 hrs. (4) First charge:- Charge given :- 320 ampere hrs. Date Column: 3-6-29 10-6-29 11-6-29 11-6-29 14-6-29 15-6-29 First Table (First Charge): Cell No. | 1 | 2 | 3 | 4 | 5 | 6 Density | 1280 | 1280 | 1280 | 1280 | 1280 | 1280 Voltage | 2.70 | 2.65 | 2.70 | 2.65 | 2.55 | 2.70 +ve to cadmium| 2.40 | 2.40 | 2.45 | 2.40 | 2.35 | 2.40 -ve to cadmium| -.30 | -.35 | -.25 | -.25 | -.20 | -.30 Acid changed after first charge, then continued at 8 amperes for 6 hours (5) Discharge at 9.0 amperes to 10.5 volts. Total hours :- 7.5 Ampere hours realised :- 67.5 Second Table (Discharge): Cell No. | 1 | 2 | 3 | 4 | 5 | 6 Density | 1130 | 1130 | 1130 | 1130 | 1130 | 1130 Voltage | 1.75 | 1.75 | 1.75 | 1.75 | 1.75 | 1.75 +ve to cadmium| 1.95 | 1.95 | 1.95 | 1.95 | 1.95 | 1.95 -ve to cadmium| .20 | .20 | .20 | .20 | .20 | .20 | ||