You need a 240W USB-C cable only if your charger and device can use USB Power Delivery Extended Power Range. For most phones, earbuds, and basic tablets, a 60W or 100W cable is usually enough. For high-power laptops, docks, and premium bundles, 240W can be worth it.

Yes, a power bank can catch fire if its lithium-ion battery enters thermal runaway, is physically damaged, overheats, is poorly manufactured, or is charged with unsafe electronics. Stop using any power bank that swells, leaks, smells strange, becomes unusually hot, or makes popping sounds.

It is normal for a phone charger to feel slightly warm during charging, especially with fast charging. It is not normal if the charger becomes too hot to touch, smells, buzzes, sparks, cracks, or stays hot with no device connected. Stop using it if any warning sign appears.

A wireless charger can work through many phone cases, but thick cases, metal plates, wallets, magnets in the wrong position, pop grips, and poor coil alignment can block or weaken charging. Thin non-metal cases usually work best.

A power bank loses charge when not used because lithium batteries self-discharge and internal circuits keep consuming small amounts of power. Fast loss, swelling, heat, or failure to recharge may indicate an aging cell, poor PCB design, or unsafe storage.