God Bless you Alvin.. and welcome. This is a great community. I know the forum members will help you find something that works for you. You may also want to post in the Pay It Forward Thread. Lots of people started with auto batteries and no longer use them, maybe some nice forum members will donate some of their no-longer-used auto batteries to you?
Pay It Forward - PIF
I had an uncle with Parkisan's Disease and remember how debilitating that was to watch him sit in a wheel chair and constantly tremble! Apparently you were intent on being a survivor by keeping a positive mind set which of course a big help.
One of the reasons for suggesting the usb passthrough battery you saw linked before is that they are automatic in the sense that the current is there at all times while the cartimizer or with the 510 likely clearomizer the vapor is right there as soon as you draw since the usb bus is always active. But the one drawback is having a wire attached that plugs into a usb port directly or into a self powered hub. You would need a hub that includes an ac adapter not drawing on a port only especially if you have more then one thing plugged into the usb hub itself.
As for automatic batteries that brings you back to the one you are seeing replaced or the smaller 808 type cigarette sized with some made to look just like a regular .... due the filter colored cartimizers and white batteries. With the Bloog batteries like many brands the 102mm batteries last longer on a charge then the 78mm and 65mm lengths. For the best vape now however their clearomizers(1.0ml, 1.6ml) with the 808 thread for those and the new 650 manual the best vape is unfortunately with the manual.
The 650 size alone typically sees a manual battery since very few of the larger sizes see Auto not manual. The vape is usually the best when pressing the button and waiting a few seconds to see the eliquid heated up a little before drawing to get the most out of it. The automatics of course require the longer draw to get he vapor going.
Fortunately Ego has about the only good 650mah automatic battery to be found! On each search so far in just looking around Ihave been coming up with the Ego or Joye Ego 650mAh automatic as the item found. They average about $15-$20 per battery as long as you don't need the charger as well where you then have to get everything usually best priced in a kit. One place has it marked down $5 at
eGo 510 Automatic Battery
That also comes in the 1100mAh size for $2 more in automatic you can look over at
eGo Battery Automatic 1100mAh | eGo T battery