Pax Vaporizer Battery Replacement
Intro: Pax Vaporizer Battery Replacement
Replacing old battery with a high capacity Panasonic NCR18650B in Pax Vaporizer.
Tools needed:
- T4 Torx driver
- Knife
- Soldering iron
Materials needed:
- Solder
- Shrink tubing
- Electrical tape
- Replacement 18650 Lithium Ion battery with pre-welded tabs
Pre-tabbed NCR18650B are available here (xpresstekstore.com)
STEP 1: Disassembly
Remove a single T4 Torx screw from the back of the unit.
STEP 2: Disassembly, Cont.
Slide the cover toward the mouthpiece. The cover is very tight and may require some force to slip off the unit. Be careful not to loose 2 little bowl magnets as shown in the image.
STEP 3: Disassembly, Cont.
Once the cover is off, you will see the internal circuitry and a single battery cell taped to the unit.
STEP 4: Battery Removal
Carefully cut the tape, remove it from the battery and slide the battery out of its compartment.
STEP 5: Disconnecting Battery
Simply rip the weld tabs off the battery.
STEP 6: Insulation Removal
Using a knife, cut and remove the shrink tube insulation from the weld tabs and wires. After shrink tubing is off, the solder joints will be visible. Use a soldering iron to desolder tabs from the wires.
STEP 7: Prepare the Wires
Slip new shrink tubing over the wires. You can also use electrical tape in the later steps if you don't have shrink tubing.
STEP 8: Connect New Battery
For a replacement, I used Panasonic NCR18650B 3400 mAh battery. This cell had the solder tabs spot welded on in our shop. The tabs are thinner and narrower than standard weld tabs in order to match the original.
Solder the wires to the terminal tabs only.
Do not solder directly to the battery!!!
STEP 9: Complete the Insulation
Slide the shrink tubing over the terminal tabs and solder joints leaving as little of the tabs exposed, as possible. Heat them up with a hair dryer or a heat gun to shrink in place.
STEP 10: Re-assembly
Insert the battery back into its compartment and replace the tape that was cut during the disassembly, any electrical tape will do. Slide the cover back over the unit, replace the torx screw.
Your Pax will not turn on. Don't worry, you just need to "unlock" the internal protection circuit. Simple place your Pax on its charging base and make sure that it is plugged in. Watch that light come to life!
16 Comments
marcelo250591 1 year ago
i have a question, when i dissasembled my pax, some orings(2 translucid ones) jump off de body of pax, near to chamber. in my case, this little ones are very dry and not fit perfect anymore, did u notice something like that? its ok just dont use it or better find some replacement?
cheers!
rclayton6219 2 years ago
maxslomoff 3 years ago
poctob 3 years ago
maxslomoff 3 years ago
poctob 3 years ago
mofuzz 6 years ago
This was perfect! Great step by step tutorial. I didn't even have to do the power reset step at the end - my pax worked perfectly when I turned it on.
I learned that when purchasing batteries it's important to make sure you are getting cells that are "tool grade" (can pull high amperage). There are very similar batteries out there that are "laptop grade" and won't work for vaporizers. I got this one:
https://www.ebay.com/itm/Panasonic-NCR18650PF-10A-...
Thanks again for an awesome instructable.
hernanreba 6 years ago
Hi. Can any PAX 1st gen owner tell me what is the value of the C19 smd capacitor? Thanks in advance!
RoscoZ1 6 years ago
Is this applicable to a PAX 3?
DannyR77 6 years ago
Thanks! Two successes with this guide. Make sure to orient the battery right! Haha
ReubenA8 7 years ago
I've done the replacement but the pax doesn't turn on even after charging.
Diescum88 7 years ago
drem reeds 8 years ago
was there any improvement to quality or battery life?
poctob 8 years ago
Yes, about 30%.
PjD12 7 years ago
poctob 7 years ago
Search ebay for NCR18650B with tabs. Last I checked, couple sellers in the US have them.