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411a Draining batteries quickly


echo

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Almost sounds like NiCad or NiMh 9 Volts, not lithiums. As Gordon suggested, try Eveready 9 Volts. They are the best at high drain. If the units are indeed pulling high currents, you should get  1 to 1 and 1/2 hours of life. The 411 should be getting warm also. Make sure both batteries are being drained. If only one battery is making contact, you will get very short life. Simply switch battery positions to see if one battery is undrained or use a Voltmeter on the "drained" batteries to see if both are at the same low voltage, 7.5 Volts or less unloaded.

Best,
Larry F

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