From what I understand these have the Zmax version 2 guys with a customizable battery body and a great display.
HARD COPY: The ego APV is a vast improvement in cost and design over its predecessors. It offers both variable voltage and variable wattage modes, and can increase power by .1 volts or .5 watts. This device can stably operate between 3.0-6.0 volts or 3.0-15.0 watts.
Device Instructions
1.To turn the device on or off press the big button 5 times in 2 seconds.
2.To switch between the VV and VW mode press and hold both mini buttons at the same time.
3.Use the left and right mini buttons to increase and decrease the voltage or wattage.
4.To check the remaining battery voltage press and hold the left mini button for 5 seconds.
5.To check the your devices resistance (ohms) press and hold the right mini button for 5 seconds.
6.This device will work with one 18350, two 18350, or one 18650 lithium ion battery. Both the AW and Unprotected batteries on our site work well in this device.
This device has the following protective features.
1.When you press the big button for 10 seconds or more the device will shut off.
When using a single battery and the voltage drops below 3.2 volts the screen will display "LO". Please recharge your battery before continuing to use it.
2.When using two batteries and the voltage drops below 6.4 volts the screen will display "LO". Please recharge your batteries before continuing to use them.
3.When you use an atomizer at 1.2ohm or less the screen will display a "LO" ohms warning. Please use a higher resistance atomizer to prevent damaging your device.
4.When you are using an atomizer with a short the screen will display "LO v". Please change your atomizer to prevent damaging your device.
5.The device will not work if you put the batteries in incorrectly. Please remove and replace the batteries with the positive end towards the top of the device.
Product Includes:
WHERE: https://vaporbank.com/
$38.99