XP Deus II
XP Deus II Battery Life and Specifications: Three Batteries to Manage
Quick answer
The XP Deus II is fully wireless, which means the coil, the remote control and the headphones each carry their own rechargeable battery and each has its own runtime. XP publishes per component figures in the manual. Backlight, high reactivity, wireless audio and cold weather all shorten them.
Most detectors have one battery and one runtime figure. The XP Deus II does not, and that single design decision explains most of what owners find surprising about living with it. XP publishes it as the world's first fully wireless fast multi-frequency detector, with no cable between the coil, the remote and the headphones.
No cable means no shared power. Each of those three components carries its own rechargeable battery, charges separately and runs down separately, and your day ends when the first of them does. That is the honest headline, and it matters more than any single published hour count.
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XP Deus II
XP publishes the Deus II as a fully wireless FMF detector with an IP68 rating to 66 feet and a 5 year warranty, which is the specification set that justifies the three-battery design rather than excusing it.
Price was accurate when this page was compiled and changes often.
What does XP actually publish for the Deus II?
These are the manufacturer's own published figures. Anything not listed here should be checked against your manual rather than against a forum post.
XP publishes 12 simultaneous multi-frequency programs, 49 single frequencies from 4 to 45 kHz, an IP68 rating to 66 feet and a 5 year warranty for the Deus II.
| Specification | Published figure | What it means for you |
|---|---|---|
| Frequency mode | Fast Multi-Frequency, simultaneous | The default and the most stable way to run the machine |
| Multi-frequency programs | 12 factory programs | Pick two or three and learn them properly |
| Single frequencies | 49, from 4 to 45 kHz | Reserve these for small gold and interference |
| Wireless architecture | Fully wireless, coil to remote to headphones | Three batteries, no cables to fail |
| Wireless protocol | XP patented, 10 times faster than Bluetooth low latency | Audio stays in step with the sweep for pinpointing |
| Waterproof rating | IP68, 66 feet | Genuine submersion, not splash resistance |
| Underwater audio | Optional BH-01 bone conduction headphones | Radio audio does not work below the surface |
| Warranty | 5 years | Unusually long, and part of the price justification |
| Terrain | Land, beach, wet sand and underwater | Gold, relic, coin and jewellery hunting |
Every figure in this table is from XP’s own published product information. XP publishes component runtime figures in the Deus II manual, and those vary by component and by settings, so they are addressed separately below rather than reduced to a single number here.
Why does a wireless detector need three batteries?
Because each component has to do its own work with no wire to carry power. The coil transmits and receives, which is the most demanding job of the three. The remote control runs the screen, the processing and the radio link. The headphones run their own receiver and drivers.
Those three jobs have very different power demands, so they have very different runtimes, and there is no useful single number that describes the system. XP publishes figures per component in the manual, and the practical consequence is simple arithmetic: your usable session is as long as whichever component runs out first, not as long as the best of them.
The upside is real and worth stating. There is no coil cable to fray at the shaft, which is one of the most common failure points on any conventional detector, and no headphone lead to catch on a fence. XP backs the design with a published 5 year warranty. The trade is that charging becomes a habit with three parts to it rather than one.
What actually shortens runtime in the field?
Published figures describe favourable use. These are the things that pull real sessions below them.
Backlight use and cold weather are the two largest practical drains on any lithium-powered detector, and both are entirely within your control before you leave the house.
| Factor | Effect on runtime | What to do about it |
|---|---|---|
| Screen backlight left on | Substantial on the remote | Use it only when you genuinely cannot read the screen |
| Cold weather | Substantial on all lithium cells | Keep the remote under a jacket between targets |
| High reactivity settings | Increased processing load | Use high reactivity where it earns its keep, not by default |
| Wireless headphone volume | Moderate on the headphones | Lower volume extends the set that usually dies first |
| Starting a hunt part charged | Proportional, and easily avoided | Charge all three components the night before |
| Ageing cells | Gradual, over years | Expect capacity loss on any lithium battery with age |
| Leaving components switched on | Total loss overnight | Confirm all three are off before packing the bag |
General lithium battery and detector power behaviour. Component specific runtime figures are published in the XP Deus II manual and should be your reference.
How does this compare with an AA machine?
Directly, and not always favourably. Fisher publishes typical operation of forty hours or more from four AA alkaline cells on the Fisher F75, and a flat set is a thirty second fix in the field with a spare in your pocket. Bounty Hunter publishes up to 25 hours for the analog Bounty Hunter Tracker IV, which has no screen or radio to feed at all.
A sealed rechargeable system cannot match that convenience, and pretending otherwise is dishonest. What it offers instead is steady voltage through the session, lower weight, no ongoing battery cost, and in this case no cables anywhere. Sagging alkaline cells change how a detector behaves before they stop it working, and a lithium system simply does not do that until it stops.
Which matters more depends entirely on how you hunt. All-day remote sessions favour swappable cells. Regular shorter hunts from home favour rechargeable. The battery runtime calculator will put actual numbers against your own pattern, which is more useful than the argument in the abstract.
Protecting the remote is worth mentioning here because it is a separate purchase to replace: a XP Deus II Control Box Cover is cheap insurance on the most expensive single component. For setup guidance see Deus II settings by site type, and for reading the screen see the Deus II target ID chart. The reviews hub covers the machine as a whole.
Sources
- XP Deus II user manual, battery, charging and component runtime sections
- XP published Deus II specification, fully wireless FMF design, IP68 to 66 feet and 5 year warranty
- Fisher F75 published battery statement, 40 hours or more on four AA alkaline cells
Frequently asked questions
How many batteries does the XP Deus II have?
Three. XP publishes the Deus II as a fully wireless detector with no cable between the coil, the remote control and the headphones, and each of those components carries its own rechargeable battery. They charge separately and discharge at different rates, so your usable session length is set by whichever one runs down first rather than by any single published figure.
What is the Deus II waterproof rating?
XP publishes an IP68 rating with the detector waterproof to 66 feet, based on a shockproof underwater remote control design. That is genuine submersion rather than splash resistance. For audio below the surface you need the optional BH-01 bone conduction headphones, because radio audio does not propagate usefully through water and the standard wireless set simply stops working.
Why does my runtime fall short of the published figures?
Published figures describe favourable conditions. Screen backlight is the largest controllable drain on the remote, cold weather reduces capacity on every lithium cell, high reactivity settings increase processing load, and headphone volume shortens the component that often dies first. Starting a hunt part charged accounts for more shortfalls than any of these. Charge all three components the night before.
Can I replace the Deus II batteries myself?
These are built-in rechargeable cells rather than user-swappable ones, so this is a service matter rather than a field fix. XP publishes a 5 year warranty on the machine, which is unusually long and is part of what the price buys. Plan around charging rather than around swapping, and carry a USB power bank if your sessions regularly run long.
Is a wireless coil actually an advantage?
Yes, for one specific reason: the coil cable running up the shaft is among the most common failure points on any conventional detector, and removing it removes that failure. It also removes the headphone lead that catches on fences and undergrowth. The cost is a third battery to manage, and whether that trade suits you depends on whether you hunt near a charger or far from one.
Researched, not professional advice. This page is compiled from published specifications, manuals and owner-review consensus, not hands-on testing. Target ID numbers, depth figures and settings vary with soil chemistry, moisture, target size, depth, orientation and firmware version, so treat every figure here as a starting point and verify it against your own machine's manual and your own ground. As an Amazon Associate we earn from qualifying purchases.