charmast C2065 20,000mAh Power Bank with Built-In Cables and 6 Outputs

Travelers who need to keep several devices powered can use the charmast C2065 as one portable battery for a phone, tablet, earbuds, or other compatible gear.

Its 20,000mAh capacity and six outputs are aimed at multi-device use, while built-in cables reduce the need to pack separate charging leads.

The digital display shows the remaining charge as a percentage. If you’re deciding between this and a smaller, simpler power bank, how much do the extra capacity and connection options matter for your trips?

Everyday use

The C2065 is designed for travel, commutes, and other situations where an outlet may not be convenient. For example, it can sit in a backpack during a day out, ready to top up a phone while you also connect another compatible device. The listed compatibility includes iPhone, Samsung and Pixel phones, Android devices, iPad, and other tablets, check that your device’s connector matches one of the available options.

Built-in USB-C, Micro-USB, and iPhone charging cables can make packing simpler, and the six outputs are intended to let you connect multiple devices at once. The exact charging speed can vary by device and connection. The power bank is rechargeable through its USB-C input or attached USB-A cable, the stated recharge times are about six hours through USB-C and about 12 hours through USB-A. The package includes a storage bag and user manual.

Spec sheet

• Name: charmast C2065 Portable Charger
• Capacity: 20,000mAh
• Maximum output power: 22.5W
• Outputs: 6
• Display: Digital remaining-charge percentage
• Built-in cables: USB-C, Micro-USB, and iPhone cable
• Color: Black
• Battery: Rechargeable lithium polymer
• Dimensions: 6.3 x 2.87 x 0.75 inches
• What’s included: Portable charger, storage bag, and user manual

What stands out

The combination of a percentage display, multiple outputs, and built-in cables is useful if you often carry more than a phone. Instead of choosing a basic battery with fewer connections, this model puts capacity and charging flexibility first. You’ll appreciate it if you want one pack for several compatible devices and value being able to see how much charge remains.

Buyer feedback is favorable about travel use, the range of charging options, and powering multiple devices before the battery needs recharging. Reports on charging speed are mixed, though: some buyers find it fast, while others say recharging the pack takes a long time. Some also describe it as heavy, and there are reports of units stopping working after a period of use. Those experiences are not a guarantee of what will happen with an individual unit, but they are worth weighing if reliability and low carry weight are priorities. It’s not for you if minimizing the weight of your everyday carry matters more than capacity and connections.

Is it worth it?

The C2065 makes the most sense for trips or busy days when several devices may need power and carrying individual cables is inconvenient. Its 20,000mAh capacity, six outputs, and built-in leads offer a different approach from a smaller power bank intended mainly for occasional phone top-ups. The trade-off is a larger-capacity pack that buyers sometimes describe as heavy, alongside mixed reports about speed and durability. Choose it for the combination of capacity and connection options, consider a simpler, lighter pack if you only need to charge one device and want to carry less.