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).
Instructions for the initial charging, discharging and preparation of a vehicle battery.
| Identifier | ExFiles\Box 26\2\ Scan059 | |
| Date | 26th April 1917 | |
| -22a- Contd. over night but time extended accordingly). If the above rate of charge be exceeded, the temperature of the battery may rise above 100°F.{Mr Friese} (Never, during the life of the battery, allow this temperature to be exceeded. If it is, reduce rate of charge or discharge as case may be). During this first charge, watch density of acid in each fell, using a syringe hydrometer, and do not allow it to exceed 1250. If it does, withdraw some acid and replace with distilled water. The battery should now be allowed to discharge through resistances or lamps to 10.5 volts (current passing) at an ampere value of 1/10 of the rated ampere hour capacity (i.e. 5.5 amperes). Then recharge immediately at the same rate as above discharge (or thereabouts) until all plates again gas freely (i.e. for about 15 hours). Now empty acid to waste and renew with acid of correct density 1250 covering plates by 3/16". Continue charge until all plates again gas freely. The battery is then in a good condition for being placed on the chassis and connected up to the electrical system. Contd. H.R. 215A (500 T) (S.D. 408. 26-4-17) Bm. 2156/13. | ||