I think if you get a good one, they are good radios. I think you'll find
lemons in all brands. I have both th-f6 and t90. I prefer the kenwood
for most things, but I've never had a bit of trouble with either of them.
If you can find someone else with an f6, you might try their battery and
see just where the problem is.
73s
Butch Bussen
wa0vjr