Problem with 18650 batteries

CPerry

Newly Enlightened
Joined
Sep 1, 2009
Messages
7
Hello, I have a Ultrafire Q5 CREE x3 LED 700 lumens flashlight model #WF700F. It takes two 18650 batteries and when I pull the discharged batteries out of the light, one of the batteries (tail battery) will not accept a charge on my Ultrafire rapid charger. It appears that the light discharges the battery too much. The company in China will not respond so I am stuck with the light. It has happened 3 times and I now have 3 dead batteries that wont charge. Any ideas to remedy the problem? Will a different charger charge the dead batteries?

I have been using cheap gray ultrafire 2400 mAh batteries in this light. I wonder if I put in the AW 18650 batteries I use in my jet III M and Jet Beam RR-2 Raptor into the Ultrafire Q5 CREE x3 LED, if the same thing will happen. I am affraid it will over dischare the AW 18650 batteries. Thoughts?
 
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