Base your travel charging plan on three things: how much you expect to use the mouse between charges, the settings you will actually run, and the charging windows your trip really offers. A quoted runtime describes how the mouse performed under its maker's test conditions. So even a gaming mouse with long battery life can't promise to last through your itinerary.
In practice, charge fully before you leave and top up at every charging window you can rely on. Count a backup option only when your exact model's documentation confirms it works.
Build a Travel Charging Plan From Your Actual Use
Match your routine to the stated conditions
Start by writing down what the mouse will do between charging opportunities. That might be an evening game session after you arrive, an hour of laptop work on a train, or some casual browsing in a hotel room. Next to each item, note the settings you plan to use, such as polling rate, connection mode, lighting and sleep timer. Polling rate is how many times per second the mouse reports its position to the computer. Only include a setting your mouse actually has.
Next, look for the conditions behind the manufacturer's runtime figure. A stated runtime may reflect mixed use rather than nonstop gaming. If you play long sessions, look for the runtime at the polling rate you plan to use. When the manufacturer lists runtime for the same settings and activity you wrote down, you have a real comparison. When it doesn't, you can't turn the headline number into hours for your trip.

Our MAMBASNAKE M5 Ultra shows how this works. Its listing gives battery life of up to 60 hours, but our product facts don't include the test conditions behind that figure. Treat it as an upper limit, not a forecast for your trip.
Place charging at dependable trip windows
Mark only the windows you can count on, such as a hotel outlet overnight or a desk at the place you're staying. An outlet you might find at the gate or during a short coffee stop is a bonus, not part of the plan. Don't assume a quick top-up gives you a set number of hours, because nothing in the specs ties a short charge to a specific runtime.
Here's an example. Say you plan to game after you arrive, you'll have a reliable outlet overnight, and the next day is a long stretch with no dependable power before another session. Charge before you leave, plug in overnight, and start the long day on that overnight charge. That overnight window matters more than the headline hours, because the maximum may have been measured under conditions that don't match your evening sessions.

If your use between two windows might exceed what the documented conditions cover, or you can't tell, change the plan. Add another charging opportunity you can rely on, move the session to right after a charge, or use the mouse less on that stretch. Keep the cable and wireless receiver together in your bag, because losing the receiver can hurt gaming performance. Our travel gaming mouse guide covers how to protect the dongle when you pack your laptop bag.
Count only a documented fallback
A cable in your bag is a backup only if the mouse works the way you need while it's plugged in. The M5 Ultra facts list USB-C charging and BT/2.4G wireless and wired connectivity. That alone doesn't tell you whether you can play while it charges or game in wired mode with a dead battery. So confirm play-while-charging support instead of assuming it from the port.
Charging power, wired data and receiver connections are separate functions. Our guide to USB-C charging and wired modes explains how to tell which ones your mouse supports and how to match cables to your laptop ports. For the M5 Ultra, download the M5 Ultra manual and look for instructions on wired use and charging before you plan around either one. If the manual confirms wired play at low battery, you can schedule sessions with the cable as backup. If it doesn't, a long stretch without power needs a full charge beforehand or a session moved to a later time.
FAQs
Can I count a power bank as one of my charging windows?
Only after your exact mouse's documentation confirms it can charge from that kind of USB power source with the cable you plan to pack. Many rechargeable mice can charge from a power bank when the device supports USB charging and the cable is compatible. Charging may stay slow because the mouse controls how much power it accepts, so don't plan around a fixed top-up time. Avoid damaged cables, and don't charge the mouse inside a hot, closed bag.
Does USB-C charging mean I can play while charging?
Not automatically. A USB-C port that charges the battery doesn't prove the mouse can send game input over that cable at the same time. The M5 Ultra lists both USB-C charging and wired connectivity, but neither one confirms that you can play and charge at once. Count play-while-charging as a travel backup only when your model's manual or product documentation says it works.
Can I compare Bluetooth and 2.4 GHz runtime on the M5 Ultra?
Not from our current listing. It includes both Bluetooth and 2.4 GHz modes, but it gives no runtime or test conditions for either mode. Don't assume the two modes last the same amount of time, and don't assume they differ. If the manual lists runtime for each mode, compare against the mode you'll actually use on the trip.