I have a TN12 2014 light on the way. Looking at getting Panasonic NCR18650B protected 3400mAh button top. The dimensions are listed as 18.67mm by 69.5mm. My questions are: will these fit properly in my light? Is it a good choice they're about 10.00 each. Also looking at getting the Nitecore D2 charger, thoughts about that. I tried to dig up this info turned out to be more difficult than I though. Thanks.