Fisher F5 and nimh

[valentassss]

HI!
I have bought Fisher F5 and rechargable batareys but the thing is that they are not alkaline, but nimh (GP20R8H) and in manual its writen that Fisher f5 works only with alkaline batareys... so my question is : will Fisher F5 work with nimh rechargable batareys? and if it does, what negative effect i could get?

 

[lazzelazer]

Well I have a F2, and my manual says the same thing: Dont use anything else than alkaline battery's.

So naturally I went straight ahead and bought a set of Nimh, to try out

They work perfect. They are rated 220 mAh.

Best regards,
Lars

 

[woodwizard]

one should always follow instructions-they were wrote for a reason

 

[Cal_Cobra]

I've used Nickel Metal Hydride rechargeable batteries on my F5 for hundreds of hours and they work great. Other Fisher F-series detector manuals state Nickel Metal Hydride batteries are fine, the F5 isn't any different. Considering how crappy the F5 manual was written, this erroneous statement isn't surprising.

The Teknetics Omega manual states:

"Rechargeable batteries can also be used. If you wish to use rechargeable batteries, we recommend using a Nickel Metal Hydride rechargeable battery."

Considering the F5 and Omega are the same platform (same base electronics, updated software) it's clearly acceptable.

hh,
Brian

 

[Paul (IL)]

Nimh batteries will work fine. They are 1.2 volts per cell but fully charged will be a little higher and the alkaline is 1.5. The detector don't care what chemistry is producing the volts.

 

[valentassss]

Thank you all for advices, tested batareys and they worked almoust perfect