This is just a clone of ego twist in a big battery that lasts about 18 hours.
It takes about 4 hours to charge this battery. A few users said it took 10+ hours to charge THE FIRST TIME .
Some users say it stopped taking charge in about 1 hour, so they diconnected it and then re-connected and it started charging again. Make sure it is fully charged!
Next, did you get the variable voltage one?
how to change the voltage: press five times to step up to the next setting, which was low (red light), medium (purple light), high (blue light), off.
Blue light indicates you are vaping at highest setting, 4.15 volts.
Are you saying blue light stays ON even when you are not pressing the button?????
Are you using the correct charging cable?
Do you have a wall adapter to plug the USB into?
Can you test the charging cable on another item?
Otherwise, put in a trouble ticket w/fasstech and initiate a return. They take stuff back and will replace. But since it's both batteries, I think you are not charging correctly.