I've been using it for over 5 years now. I use batteries instead of batteries. One charge lasts about 2 weeks (I use it once a day). After 5 years, the power dropped, water began to leak into the battery compartment, the spring rusted, the switching contacts (I already found out after disassembly). In general, I abandoned the idea of ββ\u200b\u200bfixing - I decided to buy a new one. And, it turned out, not in vain. Since the new one works 2 times more powerful. Apparently, in the old one, the mechanisms were worn out and the tightness of the fit of the piston to the cylinder decreased. If this one works for 5 years, then I will buy the same one again.
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