Hello all, another newbie question! I recently got a dovpo E-LVT 2.0 and have a few questions regarding charging. It has the option of using a provided usb cable to use passthrough charging or removing the battery and using a charger (which I have.) I've noticed however that using the usb charger it won't charge my battery (efest 3100 mAh 18650) quite as fully as my charger will.I've read that it has built-in protection in the device itself to only charge to 4.2 V, the battery itself is rated for 3.7 V so I'm not sure if that's a problem or not. In any case I love using the passthrough capabilities as I only have one 18650 as of now but need to know if I'm hurting or helping myself at all or if they are both equal and one is just much more convenient. Also, I'm not sure how often I should charge, whenever I can? Whenever it drops below 3.5? Or whenever I notice vapor reduction? I think I might be nit-picking but I really just want to have everything working optimally (plan on getting some AW's or Sony's in the near future.) Any help would be greatly appreciated, thanks!