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May 21, 2026 - 11:27 AM
The 11-inch FMF coil delivers up to 20 hours of field runtime on a full charge. This overall battery life is highly variable and will depend directly on the specific factory program, discrimination filters, and frequency ranges you select on your control unit. Because the wireless design fully self-contains all electronics inside the waterproof frame, there are no external power cables to track. The battery recharges by connecting a dedicated charging cable directly to the integrated port on the coil housing. To review how simultaneous multi-frequency processing manages internal power efficiency, read our deep-dive on modern metal detector technologies.
