Interestingly, I wanted the new Harbor Freight Bauer brushless 20 volt 4.5" angle grinder and none of the local HF stores (3 within shopping distance) had them in stock, so I ordered one online from HF. It arrived in a timely manner and I unboxed it and attached a fully charged 5 amp hour batter, fired it up and it spooled up to speed and it immediately shut off. Tried in about 10 times, same deal so I called HF in California (800 number) and explained the issue and was issued a pre paid Fed-Ex shipping label and returned it and requested a working replacement.
Seems as though HF don't have any, so I'm on a 'wait list' now... I find it interesting that HF has none. Must be sitting on a container ship parked outside San Diego harbor waiting to unload....lol
First time I ever had an issue with a HF tool.