arnesr wrote on May 29^th, 2021 at 4:17pm:

Just the GPS cannot be turned off, but I can turn off the transducer, though I'm not sure I will bother.  I believe the screen itself uses the most power, dimming the backlight to 6 or 7 should help save juice.  My test was run at a full, level 10, backlight

You guys are talking way over my head but as far as battery life goes, I know load matters.

Assuming a Ryobi 9Ah Lithium battery is rechargeable, I have a test request. Lose the bucket and let the ducer ping the open air for the test.

I ask this because with my no-frills finder running off 8 disposable AAs, I can get easily get two trips out of the batteries. If I forget to turn it off at night, which I've done more than once, I consider myself lucky to hear a tick tick tick the next morning.

Maybe another test for the backlight level would be interesting with the ducer turned off.