[Frogolocalypse]

I'm going to look myself, but do you have any links about the 18650 packs?

Edit:cheapest aliexpress ones i see are about usd$2.00 each. That's not bad though.

[willholloway]

Check ebay, packs from hover boards that got recalled are available.

The cost can be $1 a cell, a pack might have 20. Each cell might be 10-12 watt hours. It takes 3 cells to produce 12 volts.

[Frogolocalypse]

Indeed. I hadn't actually reviewed ebay for electronics things for a couple of years, because any of the products I used to see there were significantly more expensive than anything I could get from aliexpress. It looks like, at least in this instance, that has turned around. I could even see individual 18650 cells for $1.

Great stuff.