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 on battery discharge and charging procedures from an external source.
| Identifier | ExFiles\Box 26\2\ Scan361 | |
| Date | 14th May 1930 guessed | |
| -3- cause rather than continue to use up the battery output, with the risk of damage to one or more cells, remembering that the battery may not always be fully charged at the time. If the starter appears to be sluggish in its action and such sluggishness is traceable to the battery, no further attempt should be made to use the starter until the battery has been duly inspected and fully charged in accordance with subsequent recommendations and instructions contained in the battery makers pamphlet inserted at the end of this book. Battery Discharge. Care should be taken to avoid an inadvertent discharge of the battery. Such a discharge may occur if there is an earth in the wiring system, or if the ignition switch be left on in error and the tungsten contacts of the make and break happen to be left on contact. Always, when taking leave of the car, make a practice of checking that the ammeter does not show any discharge current. Charging in position from external source. It is possible to charge the battery in position on the car, making use of a flexible lead and two-pin plug which fits in the socket in the switchbox. The other ends of the flexible lead must be connected to the charging board terminals in such a way that the chassis ammeter indicates charge when the current is switched on. The chassis charging switch should be left off. Another method of securing correct direction of current is to place the plug pins in contact with pole-finding paper, and arrange that the polarity shown is in agreement with that at the plug socket, the positive being on the right, but whichever way it is done, be certain that the direction is correct. In the absence of experience, or in any uncertainty, an electrical expert should be consulted. Charging in the garage from an external source, with the battery in position on the car, is strongly recommended where conditions of running are such that a | ||