@syseng68k
Along the lines of 4000 Cycles at 4V/80%, 1000 Cycles at 4.1V/90%, 250 Cycles at 4.2V/100%, 50 Cycles at 4.3V, 10 Cycles at 4.4V.
Li based cells keep almost all charge delivered. No gassing or heat. Cells age faster and faster above 90% charge (~4.1V). Above 4.2V cell deteriorates quickly. Heat develops by way of short or straight thermal runaway.
These batteries appear to be charged only 80% and not to see cycles like a phone, netbook or tesla roadster and will hardly be discharged below 60% capacity.
(Percentages and voltages may vary with technology and design)
All these batteries should last several years.
10 out of 30 bat's in a year? Ridiculous.