A newer more improved model with more bells and whistles will be out in the market that you just can't resist and will want to
buy.

I charge mine maybe every day and a half. I have several other PV's so it's not in constant use. I figure it will probably last at least a year. Perhaps someone will come up with a battery that will replace the one that's in there. The improvements in PV's over the last year has been tremendous, and I'm sure many more improvements are on the way.