Posted by Greg Walters on July 24, 2002 at 07:56:28:
In Reply to: piranha portable posted by d daws on July 07, 2002 at 12:00:52:
Manual says 60 hours with good quality alkalines, 25 hours with backlight on.
Haven't checked this myself but have heard field reports that they last longer.
Watch your voltage with the NiCds - as the input voltage drops, so does the transmit voltage.
This is true on just about all sonar.
Not sure at what voltage that this starts to happen at but you may notice a reduction in depth reading ability or lower sensitivity.
Greg Walters
Techsonic Industries
(Humminbird)