I have had zero problems with the OEM li-ion batteries that came with anything
I own. The one in my PDA failed gracefully after seven years (almost to the
day), and the third-party replacement is coming up on three years.

Notice I said OEM. The third-party li-ion batteries for my Olympus E-500 and
Yaesu handy-talky failed a few weeks after purchase. The original batteries
are still working, years later.