Poor performance when the battery is low

[t120r650]

Have any of you observed poor performance when the battery is getting low? Yesterday I passed over a copper penny sitting on the surface and my Legend would barely pick it up. Very strange. The battery was low but it did not die right away. Anyway, have any of you experienced any thing like this?

 

[JCR TX]

I have not but I try to connect the Aux battery when the unit hits 1 bar of battery.

 

[still looking 52]

I run a fisher F5 and that has never happened to me.
When my batteries start getting low my battery bars start modulating back and forth, I've never actually let the batteries go completely dead so there could be a window from when they start modulating and go completely dead that the performance could be effected?

 

[Ronstar]

Ive run mine down to one bar running 4khz and usually by that time Im pretty much done for the day….. actually, the detector shut down once. I let it set a couple minutes and turned it back on and switched to M1 where it slowly climbed back up to two bars then back down to one bar.

 

[markinswpa]

Ive run mine down to one bar running 4khz and usually by that time Im pretty much done for the day….. actually, the detector shut down once. I let it set a couple minutes and turned it back on and switched to M1 where it slowly climbed back up to two bars then back down to one bar.

Ron is there a certain mode or frequency on the Legend that drains the battery faster ? I remember reading ATHC on the Manticore and one of the modes on the Deus ll will shorten run time pretty quick. Just wondering. Mark

 

[Suncoast Kid]

When you're running a very low frequency like 4kHz, it will run the battery down much faster than running a higher frequency. I remember reading it somewhere, maybe the manual, but the difference was quite significant.

 

[Ronstar]

Mark, sorry for the delay…. Been busier than a…. Well you know.
Yes, on the Legend if you run 4khz it will probably be near dead by 6 hrs or shorter.

 

[Justme]

I've noticed when my batteries are dead on any device, preformance suffers greatly.

 

[IDXMonster]

Pretty much any modern detector, except for perhaps a 10$ third world kids toy, will have voltage regulation…once it hits a certain voltage it’ll shut down. Above that voltage, performance will be as it should be. The OP running over a penny and not detecting it is most certainly a case of something else being on or in the ground that wasn’t seen and was masking the penny because of where disc was set. Running low frequencies, running the external speaker and running very little disc which allows the speaker to be talking all the time will all wear batteries down faster.

 

[MuddyMo]

I'm not sure it's a common part of most detectors but it would seem like it should be . I know minelab pointed it out on their Xterras. I do believe on the older analog machines that battery health does seem to affect performance.