OLD MOTOR-CAR BATTERIES

Radio Record, Volume I, Issue 49, 29 June 1928, Page 14

OLD MOTOR-CAR BATTERIES

AVAILABLE FOR RADIO, OTOR-CAR accumulators are usually made heavier than those designed for radio work. The car battery receives severe usage, and is usually discarded when it fails to turn the starter over snappily. The discarded battery will often be found to be suitable for the radio set, since radio service is less exhausting. Most cars use either a 6-volt or a 12-volt battery. Usually 6-volt batteries are used for radio. The voltage of the accumulator can be determined by counting the vent gaps-one to a cell. ach cell yields two yolts, and they are connected in series to add up to six volts. If the battery is of 12 volts, a tap will have to be made at the centre and half used at a time. Be sure about the polarity; if you haven't a yoltmeter to check it, remember the positive is always the dirtiest terminal, Mark the polarity by scratching pliis and minus sigus on th. wax coating. Clean the battery thoroughly-a good wash with soap and water and serubbing brush outdoors will do the job. To make contact with the terminals it is advisable to use regular battery clips. You won’t be able to charge the old ear battery fully, but you will get a year or more of service out of it,