If you type "VEKEN XQ406" into a search engine, you will encounter two completely different items. One is an automatic water fountain for cats and dogs with a 2.8-liter capacity—a product frequently discussed by pet owners. The other is a rectangular lithium battery (3.8V, 3760mAh) designed for use in industrial handheld terminals. Although they share the same model string, the two products are entirely unrelated.

This article focuses on the latter—the battery.

Who is actually looking for this battery?

People searching for "For VEKEN XQ406" likely own a Datalogic industrial PDA, specifically the Mobydata M71 model. This device is commonly used in warehouses, logistics, and retail inventory management. However, the original battery typically begins to fail after two or three years of use; users often experience a drastic drop in battery life and sluggish performance—such as significant lag when scanning a single barcode.

The tricky part is that searching for the device model "M71" doesn't always yield the right battery, whereas searching for "XQ406" brings up plenty of results. This is because XQ406 is the battery's specific part number, while M71 refers to the host device. Sellers are aware of this connection, but first-time buyers often have to do some digging to figure it out.

Actual battery specifications and common pitfalls

Genuine XQ406 batteries have standardized specifications: a lithium-ion cell, a nominal voltage of 3.8V, and a capacity of 3760mAh (translating to approximately 14.2Wh of energy). They feature a black casing and are lightweight, as they are designed for handheld devices.

However, there are multiple versions circulating on the market. Some batches are labeled as 3800mAh single-cell lithium-polymer batteries, differing slightly from the standard version. While this capacity difference is minor, the real issue to watch out for is the battery's physical shape and the placement of its connectors. Different batches of XQ406 batteries may have subtle variations in contact pin layouts; buying one that doesn't fit—and the subsequent hassle of returning it—can be incredibly frustrating. A safer approach is to remove the device's back cover, take a photo of the original battery, and use that photo to confirm details with the seller. Don't simply place an order just because the product page says "Compatible with M71."

Prices vary significantly across different channels. Sellers in Taiwan list them for around $71–$89, while in Europe, the converted price is roughly 40 Euros; domestic channels (if you can find them) are usually cheaper. However, low prices come with risks—quality control for these replacement batteries is inconsistent. Some claiming to use "Grade A cells" may actually offer only half the cycle life of the original.

A quick explanation of the relationship between "VEKEN" and "Datalogic":

When searching, you will see both "For VEKEN XQ406" and "Datalogic XQ406." These aren't two different products; VEKEN is the brand, while Datalogic is the brand of the device itself—they refer to the exact same battery. You might also encounter internal codes like "22KK110_Oth"; these don't matter—just know they refer to the same item.

Things worth doing in the five minutes before you buy:

First, confirm whether your device is actually an M71 or a different model. Although the XQ406 is primarily designed for the Mobydata M71, Datalogic has other handheld terminals, and the batteries are not interchangeable.

Second, check if the seller has CE or RoHS certification. While this certification doesn't guarantee top-tier quality, it at least indicates the battery wasn't hand-soldered in a makeshift workshop.

Third, have a realistic price expectation. Options that are too cheap (e.g., under $20) likely use recycled cells; their battery life might be worse than your current, degraded original battery.

Finally:

The XQ406 battery isn't complicated; its specifications and compatibility are clear-cut. The real headache comes from the pet water fountains that pop up in search results and the confusing compatibility descriptions on various seller pages. Just remember one thing: you are looking for a 3.8V, 3760mAh lithium battery for the Datalogic Mobydata M71—nothing more, nothing less. As for the rest, opening the device to look at the original battery is more useful than browsing a hundred product pages.

VEKEN 3760mAh/14.2Wh 3.8V XQ406 Battery for VEKEN XQ406