9v batteries for Metal Detector

Teams Woodworking
1

We have just been buying batteries as needed for this, but sometimes we forget etc and the metal detector becomes no good.

Do we all think it would be a good idea to get some rechargeable batteries for this?

3 options:

Cheap NIMH


Li Poly 550mah

Li Poly 700mah (expensive)


I’m not sure theres any great advantage to going more expensive? I think the detector changes its behaviour as the voltage drops a bit, thats why the fine tuning dial is there, but whether better batteries would help or not i’m not sure.

For comparison, a bulk pack of 9v’s:

(not very eco friendly i guess)

Feedback please.

2

Most cheaper chargers are only time based and can easily overcharge batteries.

Two of the battery chargers have no information about their operation (searching on google),
As such I would be inclined to go with the I-Power option (charger and two batteries to start with?)