For a tiny 12 >volt motor like this what would the best battery be to use? The article says >to use 8 C Nicad batteries, 1.2 volts each, this only adds up to 9.6 volts. >Would this hurt the motor by using less than twelve volts. I tried two 6 >volt lantern batteries, the pump was flying. Then I used a single 9 volt >battery, this had a bout 3/4 the output and lasted for a 1/2 hour. Could someone >one tell me what the real difference are between these batteries. The 6 >volts are two pound each and I think the 9 volt weighs about one ounce That weight difference should be telling you something. A chemical reaction produces the electricity. There's just not that much in the usual 9V transistor radio battery. You should pay attention to a spec regarding current flow and battery life, usually in units of mAh or Ah (milliampere hours or ampere hours). the 9v battery probably can't put out more than 30 milliamps adequately. it's really meant for radios and walkmen, rather than raw power such as a motor. Those 6v batteries can produce 'way more current, 500 milliamps to an amp or so. NiCds can produce very strong current flow, and that's what's important for this application. How about trying 8 Alkaline C or D cells? They too can push out the current and have a longer life than the carbon/zinc cells. *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Fri Jul 09 1999 - 19:55:10 PDT
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