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Don’t want to shag tools/batteries
Don't forget that lithium ion batteries have a tendency to explode/catch fire if overheated or subjected to impact. The tool manufacturers have spent a lot of money developing their battery packs and manufacturing techniques to virtually eliminate these problems can the same be said of chinesium knock offs? The last time I looked to renew my tradesman's insurance 2 of the companies who quoted had a clause that invalidated my policy if I left batteries charging overnight in client's properties, which implies it's not an unheard of problem.
I’m a purist/snob/paranoid.
I don’t know if the knock offs have the same cut off capability. Don’t want to shag tools/batteries.