I saw some people offering advice that doesnt apply to this battery: THERE IS NO NEED TO CLICK THE BUTTON 5 TIMES TO TURN IT ON, this is not the Triton (which does require 5 clicks to turn on)
just wanted to make sure it was seen. The G6 manual battery just requires a press and hold of the button to activate
So to recap
-The cart's work on your automatic battery, but not the manual
-Manual battery is fully charged, and light comes on when button is pressed
-Automatic battery terminal is slightly larger than the manual (mine are the same way, both work. Im going to assume this is not the issue)
So in my mind, the issue lies in either the cart-to-battery connection, or inside the battery itself. If it is inside the battery, not much we can do . You would need to contact Halo about a replacement
But they would ask if you tried their basic "troubleshooting" anyways, so may as well try it out now
1- I cannot remember if mine did, but does it look like there is a plastic/vinyl protective piece over the battery terminal? (much like the plastic stuff that covers new electronics) Possibly try taking a paperclip and GENTLY scrape a bit on the terminal to make sure nothing comes off the top
2- Take a q-tip/cotton swab, and any iso alcohol (70% or higher, 97%+ electronics grade cleaning alcohol preferred) and dab and wipe the top of the terminal, and around the threads.
Can also take a toothpick and make sure the holes on the side of the battery are completely cleared. THen run the toothpick around the inside of the terminal around the post (this is called the Moat) to make sure nothing is in there as well. Finish up with a wipe from a paper towel. Make sure all the alcohol is gone before attempting to use it (no fun to inhale that stuff, poison)
3- Make sure you are holding the button down while you are using it to vape. When my wife first used my G6 manual, she thought she only had to press the button for it to work, and nothing was comming out. I had to explain that she had to hold the button down while vaping.
4- If possible, (and didnt see you mention this) try another cart. There could be a slight gap that would cause issues with one cart/batt combo, but a different cart might might make the connection.
Thats all I have for my basic troubleshooting. If after all this it still doesnt work, I would contact Halo (either via Cinder Ella, the halo rep on these boards, or through email and phone. Usually takes 24-48 hours to hear a response)
good luck