Charger and tester w/ USB output

I plan to harvest 18650 cells from laptop battery packs by digging through various e-recycling and battery disposal bins. Overall, my goal is to have a supply of cells in reasonable condition that I can use to charge my phone.

I figured that having one device that does it all will keep things simple. So far, I've found two chargers/testers that also have USB output:

  • XTAR DRAGON VP4 Plus
  • LiitoKala Engineer Lii-500

Does anyone have experience with these chargers (and in particular, the USB output/powerbank feature)? Are there other chargers/testers that I should be looking at?

I suggest reading HKJs reviews

https://lygte-info.dk/info/indexBatteriesAndChargers%20UK.html