[Yaesu] Re: FT-50 battery drain

[Mike Morrow]

An earlier post stated that a 150 microamp battery drain (when the FT is
OFF) would deplete the battery in 10 days.  

I think the actual calculation should be:

Service Hours = (Battery Capacity in mA-hrs) / (Current drain in mA)

The typical FT-50 battery is 600 mA-hours capacity, and 150 uA = .15 mA,

Service Hours = 600 mA-hrs / .15 mA = 4000 hours

4000 hours = 23.8 weeks.  A battery should not deplete in a mere 10 days
of non-use.  Most likely, battery self-discharge would be a much more
significant effect in battery depletion.

My several FT-50s all pull 240 microamps (.24 mA) from the battery when
the radio is off, regardless of whether the battery is a 6, 7.2, or 9.6
volt unit.

Supposedly there is a Yaesu service bulletin out for some FT-50s that
have a much higher current draw when off.  Up to 10 mA has been reported
by some!

Regards,
				Mike / KK5F

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