I recently experienced a sudden loss of battery capacity in my equipment, causing it to last only for 6 hours at TX=1.

I started to wonder if the neodymium magnet I had been using for treasure hunting, which I stored in the trunk along with other search equipment, may have had a negative impact on the coil’s functionality.
(I will say that I still use old types of black coils, not X35 XP Deus coils).

To investigate, I took an 80 kg magnet (40 mm in diameter) and walked around the areas where the coil contained the circuit board with an LED.

After doing so, the frequencies on the board began to switch with a delay, and the coil would only work at 18 frequency.

Upon researching XP Deus coils, I found out that they contain polarized relays with magnets inside, which are responsible for producing light clicks when the metal detector is switched on or when switching to another search program.

Axicom IM41 3vDC relays. Also suitbale: Omron G6K 3vDC, IM41 3V
under SMD mounting the feet are bent outwards.

After resoldering and repairing the XP Deus coil the relay everything was back to normal.

So, be cautious with search magnets and to avoid carrying all equipment in close proximity to the coil and magnet.

I have never encountered such damage to a coil before, as normally, any damage would result from wear and tear or moisture penetration.

When damaged, a coil would start to produce random squeaking sounds and show signs of condensation under the plastic cap of the LED.