Nope....Ozito id one of the brands I have had good results with......and I can get 2 years warranty.....some were 3 years warranty.
Main point is, being much cheaper than the main brands, if/when they fail it goes straight in the bin, no spare parts to replace or source and a warranty claim is a complete replacement item every time......if it's still in stock, or a refund.
Once I started stocking everything with Lithium the game changed for the better......I just dumped all my NMH batteries as they don't last long on the shelf.
Just for the record.....try KENTLI lithium batteries on EBAY......AA and AAA size......they have a special circuit board built into each battery to make 3.7 volts good to 1.5 volts......special charger etc, but oh how long they last.....my digi camera AA KENTLI batteries were still performing after 4 months idle time.
On the 3D printer topic, I think the maintenance would be like CNC...... set up and walk away.
I would think that multiple print nozzles on each machine would have to be the way to go if you wanted any output in a reasonable time...….CNC does it that way but with a single spindle.....not quite the same way but cutting many parts from a single board ….whatever.
I wouldn't think making many parts on a single machine with a single print nozzle would be practical......as I'm not at all into 3D printing, just surmising, the technology will no doubt generate it's own criteria.
Ian.