Anyone use the EagleTac T100C2 with a Tenergy 18650? Seems like the (+) end is pretty flat and isn't making contact? Are the (+) ends of all 18650's flat?
Anyone use the EagleTac T100C2 with a Tenergy 18650? Seems like the (+) end is pretty flat and isn't making contact? Are the (+) ends of all 18650's flat?
It would probably be better to solder something to the battery and not the head, since the bezel contact is gold plated. I don't think you really want to ruin the gold plating by putting solder on it. It could also interfere with the low/high switching mechanism.
The safest option would be to get some non flat topped batteries.
Your 18650's read 1.4 volts? That is WAY too low, and they are probably beyond repair.
The reverse polarity protector on the Eagletac is a physical protection. I believe it has a raised lip around the positive contact that prevents the flat negative end from touching the positive contact. However, this means that batteries that have 2 flat sides will not make contact. Most protected 18650s are not flat topped, but apparently Tenergy still makes their protected cells with flat tops.
Well the point of the gold plating on the contact is to prevent corrosion, not reduce resistance. Soldering it would probably nullify this protection.
Out of curiosity, what made you choose the tenergy batteries over others? I am pretty sure that they are non flat topped protected cells with equal or greater capacity.
You could try these:
http://kaidomain.com/ProductDetails.aspx?ProductId=2658
The issues I have heard are of the magnets making contact where they shouldn't and shorting out the battery somehow. A magnet might affect the circuitry in the light or in the battery, but this depends what sort of electronics are inside. I don't think that it is likely that the magnets will affect the circuitry on the PCB or in the head. Magnets are most harmful to magnetic storage devices like hard drives, but I doubt you will find any in batteries or flashlights (flashlights use "flash memory," of course! Ok, maybe not...) It would probably be better to solder something to the battery and not the head, since the bezel contact is gold plated. I don't think you really want to ruin the gold plating by putting solder on it. It could also interfere with the low/high switching mechanism.
The safest option would be to get some non flat topped batteries.