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Radim

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You are welcome. Since Arctic runs on one 18650 and the supplied batt is 2100 mAh Panasonic, if I'm not wrong, it is Ok. Mine does the same thing. In addition - when laser is cold (like below 15 deg Celsius) the battery internal resistance increases and when the current draw is high (laser on full power) the batt protection circuit just kills it and laser restarts. But be careful with 18650 not only to have it protected, but also dimensions are different, for Arctic there fits 18 mm diam 650 mm length batt perfectly, but Nitecore for example has about 655 mm length and it is so so, the tail cap holds on a few threads only.
 

Brainy

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Yea i had to drop of the protection circuit of my Enerpower 3200 MAH to get it fit in.

Going to drop the Panasonic wich the laser camed with in the garbridge, doesnt want explosions in my laser/room.. :D
 




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