XP D01, D28, X35, and FMF Coil Battery Replacement Kit

This battery replacement kit works with XP D01, D28, X35, and FMF coil models used on Deus and Deus II metal detectors. These coils share the same battery design for their wireless transmission systems, so one kit covers multiple coil types. The replacement battery restores the coil's wireless link to the control unit when the original battery's voltage declines. If you own multiple XP coils from this series, you can use the same kit for future replacements across your coil inventory.

Your XP coil battery needs replacement when battery voltage decline affects the coil's wireless performance and reliability. Battery voltage decline is gradual, and when performance issues appear, the battery has reached the end of its service life and a replacement restores full wireless performance. The battery powers the coil's wireless transmission to the control unit, so maintaining good battery health is essential for reliable detecting. Replacing the battery when it starts declining ensures your coil maintains consistent wireless communication during hunts.

Max Repair is a waterproof adhesive sealant that reseals the XP coil housing after you open it to replace the battery. XP coils are sealed units to maintain their waterproof rating, and breaking that seal to access the battery compartment exposes the internal electronics to moisture risk. The Max Repair sealant creates a waterproof bond between the housing halves, allowing you to continue hunting wet sand, shallow water, and rain without water intrusion. The sealant is essential for maintaining the coil's original waterproof integrity after the repair. For more on how wireless coils function, see our guide to metal detector technologies.

You can install the replacement battery yourself if you're comfortable with basic repair work and have patience for the resealing process. The installation involves opening the coil housing, disconnecting the old battery, installing the new one with the clamp hardware, and applying the Max Repair sealant to reseal the housing. The mechanical steps are straightforward, but the resealing phase requires careful application of the sealant and adequate cure time before submerging the coil. If you're not confident in your ability to achieve a proper waterproof seal, have the work done by a qualified technician who has experience with XP coil repairs.

Max Repair sealant requires adequate cure time before the coil can be submerged in water. Allow the sealant to fully cure after application before exposing the coil to moisture. Rushing the cure can compromise the waterproof seal and allow water to enter the coil housing, which damages the internal electronics. A properly cured seal maintains waterproof integrity for wet-environment detecting. The Max Repair sealant ensures your coil maintains its waterproof rating after the battery swap, which is particularly important if you hunt beaches or wet conditions where water intrusion could damage the electronics.

This kit works with both the original XP Deus and the Deus II because the D01, D28, X35, and FMF coils are compatible across both detector generations. The wireless transmission system and battery design are the same for these coil models regardless of which control unit you pair them with. If you own an original Deus and run any of these coils, the replacement battery restores wireless performance just as it does for Deus II users. The kit is not model-specific to the control unit, it's specific to the coil series.

If you don't replace the battery when it starts failing, the coil's wireless link to the control unit will become increasingly unreliable until it stops functioning entirely. Early symptoms include intermittent disconnections and reduced pairing range, but as the battery voltage drops further, the coil may fail to power on or maintain a stable connection during hunts. A completely dead battery leaves the coil unusable until the battery is replaced. Continuing to use a coil with a weak battery also risks losing targets mid-hunt when the wireless link drops unexpectedly. For additional coil maintenance supplies, visit our metal detector parts & accessories collection.

The sealant tube can be reused if properly sealed between uses to prevent the sealant from drying out. XP users with multiple coils can perform multiple repairs from one kit by sealing the tube properly after each use. If the sealant hardens in the tube, it becomes unusable, so proper storage is critical for getting multiple repairs from one tube. The kit includes everything you need for a proper repair, including the Max Repair waterproof sealant tube for proper resealing. Keeping the cap tightly sealed between uses helps preserve the sealant for future battery replacements.

Check your coil's warranty status before proceeding with a DIY battery replacement. If your coil is still under warranty and experiencing battery issues, contact XP or an authorized service center before attempting the repair yourself. For coils outside the warranty period, the battery replacement kit is a cost-effective way to extend the coil's service life without replacing the entire unit. Battery replacement requires opening the coil housing, so if you're not comfortable with the repair process, consider having it done by a qualified technician. Results may vary depending on your specific coil model and age.

The installation steps involve disconnecting the old battery, installing the new one with the clamp hardware, and resealing the housing with the Max Repair sealant. Battery replacement requires opening the coil housing, so take your time with the resealing process. The kit includes everything you need for a complete battery replacement, including replacement battery, Max Repair waterproof sealant tube, and clamp hardware for secure battery installation. If you're not comfortable with the repair process, consider having it done by a qualified technician. For technical support, visit our XP metal detectors - authorized US dealer page for contact information.

Results may vary depending on your specific coil model and age when it comes to battery replacement frequency. The battery replacement kit is a cost-effective way to extend the coil's service life without replacing the entire unit when battery voltage declines. Each replacement restores the coil's wireless performance and delays the need for a full coil upgrade. The kit includes everything you need for a complete battery replacement, including the replacement battery compatible with D01, D28, X35, and FMF coils, Max Repair waterproof sealant, and clamp hardware. Maintaining good battery health is essential for reliable detecting with XP wireless coils.