[TriEmbed] Battery tab spot welders

[Kevin McClaning]

Does anyone have opinion on battery tab spot welders, ala

https://www.amazon.com/Sunkko-Pulse-Welder-Battery-Charger/dp/B07452C39Q/ref=sr_1_1_sspa?ie=UTF8&qid=1540331967&sr=8-1-spons&keywords=battery+tab+spot+welder&psc=1

I had another DeWalt battery pack die today and thought it might be time 
to buy one. Looking for desired features, safety, general comments. Thanks!

Kevin