Four portable power banks tested: which one fits your needs?

The anxiety of watching your phone's battery percentage drop while you're hours away from an outlet is something most of us know too well. The market is flooded with portable power banks, but finding one that actually delivers on its promises—and won't catch fire in your backpack—requires more than just grabbing the cheapest option on the shelf.

There are solid entry-level choices everywhere: compact 10,000mAh units that charge at 30W and cost around $70 will keep your phone alive through a weekend. But if you're willing to spend more and want something that genuinely earns its place in your bag, there are four standout options worth considering, each solving a different problem.

The first is built for people who need raw power and flexibility. The P63 can deliver 100W of charging speed—more than most of us will ever need, but reassuring to have. It charged a MacBook Pro from nearly dead to full in a couple of hours while the owner was actively working, using less than half the bank's total capacity. A phone drawing 40W, a gaming handheld pulling 65W, or a laptop needing 90W will all charge at their maximum speed from the main USB-C port. The bank holds enough juice to fully revive a phone four or five times over. It's a fingerprint magnet and comes with a hidden USB-C cable built into what looks like a lanyard—a clever touch, though stressing that cable worries me. When you're charging multiple devices simultaneously, the bank gets hot and the secondary ports get throttled down to bare minimums, but for single-device charging it's excellent.

If you prefer simplicity and don't mind a different approach entirely, the magnetic option changes the equation. The Fortix 10,000mAh model snaps onto your phone magnetically, eliminating the cable-plugging ritual. It charged a phone twice with juice left over, and the magnetic attachment was solid enough to grip like a pop socket, though it did make the phone bulkier. The 15W wireless charging speed falls short of the theoretical 25W maximum, but the convenience of just snapping it on while sitting at a café—without needing to sit down with a cable and bulky pack—felt like a genuine quality-of-life improvement. The bank uses semi-solid state battery technology, which means far less flammable liquid inside and thousands more charge cycles than traditional lithium-ion. The tradeoff is a lack of a display; you get only a row of LED dots showing remaining capacity.

For travelers and people who move between locations constantly, the BoostCharge Hybrid solves a different problem by being two devices in one. It looks like a standard travel charger—a black brick with USB-C and USB-A ports and swappable international plugs. When plugged into a wall, it delivers 25W of charging power. But it also contains a 5,000mAh battery inside, so when you unplug it and move to another room or location, it continues charging connected devices at up to 20W. The numbers aren't impressive compared to dedicated power banks, but the device is genuinely pocketable and the convenience of having one fist-sized object do double duty is real. The owner found themselves using it at home constantly—something they'd never done with other battery banks—because it's always plugged in and ready.

At the extreme end sits the Prime, a thin brick that's less pocketable but still grippable. It's designed for people with serious charging demands: a laptop plus a phone, or a work setup that needs constant power. It accepts 100W input, meaning you can half-fill it in under thirty minutes from a strong wall outlet. Once charged, it can push 100W to each of two USB-C ports simultaneously, or boost to 140W if you're only charging one device. There's also a USB-A port delivering 20W or 22.5W depending on what else is plugged in. The total maximum output reaches 220W, and yes, the device gets warm. A color screen lets you cycle between displays showing remaining battery, exact wattage flowing through each port, and temperature readings. Bluetooth connectivity to Anker's app lets you tweak settings and monitor live power stats. The price tag climbs to $300 or beyond, and if you want to integrate it with Anker's desktop charging bases, you're looking at $400 total—a hard sell unless money truly isn't a consideration.

Beyond choosing between these options, battery safety matters. High-capacity rechargeable batteries can be genuinely dangerous if they overheat or malfunction, potentially causing fires that are difficult to extinguish. The good news is that almost all incidents stem from either poor manufacturing or careless handling. Stick to known brands and buy from trusted retailers. Look for regulatory compliance marks—the FCC and CE marks internationally, or Australia's Regulatory Compliance Mark, a circled tick inside a triangle. Never leave batteries charging unattended on soft surfaces like beds or blankets, unplug them once charged, and keep them away from heat sources. Inspect regularly for cracks, bent connectors, or swelling. Modern USB devices negotiate safe power levels automatically, so plugging a low-power device into a 100W charger is safe—but quality chargers and cables ensure those safety handshakes work properly. One final note: power banks under 100Wh are allowed in carry-on luggage on planes, but they're prohibited in checked bags, and using or charging them mid-flight is largely banned now.