DRTMI

Don't let your juice seep onto the connector.

I believe they are 3mm, but the heads are shaped funny. I have my on modified case if you are interested. My battery crapped out and I had other batteries and boxes so I put the chip in one of those.

I had one that did the same thing. The only way to tighten the nut on the 510 connector is to take the battery out and de solder it from the board. Taking the battery out is a royal PIA as the tape they use to secure it is overkill. I ended up taking the chip and screen and putting it into a different box. So if you really like the mod, I would suggest trying to the contact for SMY USA service.

A USB port on computers is limited to 500mAh due to the wiring and power supply in the computer.

This please. What good does it do to show the applied voltage while you are vaping in wattage mode? You can't see the screen while vaping.

Those look really nice. I wish I would seen this before last Friday, when I ordered my 1590G+.

The v3 has the doors held on with screws and the battery soldered directly to the board.

Your computer can only put 500mAh which is .5a