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    Help!! Battery problem or charger problem?

    Dave, thanks for recommending me the threads about the DMM and the li-ion battery. I have little knowledge about li-ion battery and those threads will definitely be helpful to me. I will not use that defective battery any more. Again, thanks all for helping me to figure out the problem.
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    Help!! Battery problem or charger problem?

    I tried to measured the voltage of the charger without battery. The voltage is between 6.6 to 6.7v (I couldn't precisely read the voltage since the number changes rapidly). Does this mean there is no protection in the charger?
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    Help!! Battery problem or charger problem?

    Hi march, thanks for recommending the "Harbor Freight" store. I searched the nearest "Harbor Freight" and went there today. It looks I am lucky since they have some multimeters on sale today. I bought a "Cen-Tech 7 function multi-meter" for only 2.99 (regular is 7.99). I tested both the good...
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    Help!! Battery problem or charger problem?

    Thanks all for invaluable suggestions. For satefy, I will definitely get a digital multimeter. I am living in US. It seems Maplins only sells in UK, I will probably buy a DMM from some local electronic store. I have tried to charge the other battery (the good one) after I used that battery in...
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    Help!! Battery problem or charger problem?

    45/70, thanks for your suggestions. I currently don't have any device to measure the voltage, I may get one pretty soon. This is my first time to buy rcr123a batteries and charger and I don't have much experience. Next time, I will definitely buy more reliable ones.
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    Help!! Battery problem or charger problem?

    Thanks!! I also agreed that the battery may be problematic. Now, the strange thing to me is that every time I insert the "bad" battery into the flashlight, there is still a blink of light, then the light goes off. If the battery is totally dead, then there should be no light at all. That's kind...
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    Help!! Battery problem or charger problem?

    I bought a pair of solarforce protected 3.7v RCR123a batteries from ebay and received them today. I tried them in my new Quark mini 123 flashlight. One battery works fine. The other one only works 0.1 second then the light goes off, what i means is that when I turned on the flashlight, there is...

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