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PAX 2 Battery replacement guide

Philip Haasnoot
Aug 15, 2017 · 7 min read

Stop throwing shit out…. I never bought into the “Disposable” society that discards technology as soon as the next best thing comes out. This guide will show you how to repair your perfectly good PAX 2 with a new battery and breathe new life into an already outstanding product.

Let me start by saying that PAX is a phenomenal com p any that has shown with each iteration of the PAX vaporizer that they can innovate. How good of a design is the PAX? At one point I thought to myself “I should get into the vaporizer industry.” One day shortly after that thought my fiance came home with a PAX 1 and I was so impressed with the overall design and functionality that I changed my mind about making a splash in that industry.

TLDR; The PAX is one of the most well designed pieces of vaporizing equipment around. Highly recommended.

But the one Achilles heel of even the most well engineered product is always the lifespan of their battery. In the case of the PAX this comes from the internal lithium cylindrical cell, which generally can be charged to around 500 cycles before you see degradation of the capacity (it will store around 70% of the original capacity at 500ish charges). As time goes on the cell will hold less of a charge, heat up slower due to decreased current output, and generally cause the end user to be frustrated.

This is a great tear-down of the PAX 2 so you can ogle at the guts of the device. This is however destructive and we can’t take the milling machine approach since we want to keep using our PAX 2.

This article will walk you through the process of changing the 18650 sized lithium cell and effectively double the life of the product.

DISCLAIMER

This process will require you to be proficient with several types of tools including power tools, soldering equipment, and a firm grasp of common sense. You are performing this repair at your own risk, it WILL void your warranty; however this warranty does not cover the battery so if you want to revive your device this is the only way to do it. PERFORM THIS PROCESS AT YOUR OWN RISK, I assume NO responsibility for personal injury or damage to your device.

With that said here is the list of parts you will need:

  1. NCR18650B protected Lithium cell — $8ea
  2. Solder braid or small battery tabs

And the tools you will need:

  1. Soldering Iron — I have the older version of this Hakko, going on 6 years it hasn’t failed me yet.
  2. PCB Endmill or small drillbit — something around 1/16″ in diameter
  3. Dental Pick or Small Flathead screwdriver
  4. Double sided tape
  5. Spudger or similar prying tool

Alright so if you watched the teardown video linked above you will know that the guts of your PAX 2 are held in with a clever key that also holds the pogo-pin targets for the charger. We need to remove this in order to access the battery compartment:

STEP 1 — Drill baby Drill

Take your endmill/drillbit and drill a small hole in the plastic key to give us a place to start prying it out. Unfortunately I choose to start prying on the very end and in the wrong direction and fractured the key, I have a 3D model that you can 3D print to replace the key entirely posted at the bottom of the article in case you completely demolish yours.

Stop throwing shit out…. I never bought into the “Disposable” society that discards technology as soon as the next best thing comes out. This guide will show you how to repair your perfectly good PAX…