Why is is that u cant buy the best batteries

[HiFiveBro]

According to the Plumes of Hazard show, Mike from Illumination Supply actually talked with a higher up of Sony about the vape industry, and they're considering actually making a cell specifically for vaping. Also xtarlight has the VTC4's labelled as batteries "good for e-cigarrettes"

The Sony VTC4 18650 2100mAh battery is a 30Amp high drain battery powered by Sony. Great for a variety of products that require higher than normal amperage. Like all of our batteries it features improved stability due to low internal resistance. It was designed based on high-performance flashlights and electronic cigarettes (e.g. mods, clones, mechanical, etc.)

I highly doubt they'd pull them from the market when Sony they just made a new factory for their reproduction. We're just experiencing the fallout of supply from back when the nuclear power plant was shut down in Japan after the Tsunami, which affected their old factory.