Promate Power Bank, Universal 10000mAh Ultra-Slim Portable Charger with 20W USB-C Input/Output Port, QC 3.0 Output, USB-C Ports, Over-Heating Protection for Smartphones and Tablets - White / BOLT-10PD.WHITE / BOLT-10PD.WHITE

The Promate BOLT-10PD in white is a universal 10000mAh portable charger with a 20W USB-C input and output port, Quick Charge 3.0 output and over-heating protection. Promate builds it slim, which is what keeps a 10000mAh pack in a pocket rather than turning it into another item in the bag.

The USB-C port delivers 20W, the level modern phones use for their fastest charging. At that rate a short stop moves a phone a long way instead of adding a token amount, which is what makes a mid-size pack useful during the day rather than only as an overnight charger.

A QC 3.0 output sits beside the USB-C port for devices that use Quick Charge rather than USB Power Delivery. Covering both standards is what makes the BOLT-10PD universal in practice, since a phone's fast-charging protocol is set by its chipset and cannot be changed by swapping cables.

The 20W USB-C port handles input as well as output, so the pack refills through the same connector it charges devices from. A single bidirectional port keeps a travel kit down to one wall charger and one lead, which is the whole reason USB-C became the standard on portable batteries.

Over-heating protection watches the cell while the charger is working in either direction. Heat is the main failure mode for lithium batteries, and this is the part of the specification that never announces itself in daily use, which is precisely why it is worth checking before you buy.

The ultra-slim body is what decides whether a charger comes with you or stays behind. A slim pack slides into a jacket pocket, a laptop sleeve or a backpack pouch without adding a noticeable lump, and a charger left at home is worth nothing regardless of its capacity.

Capacity sits at 10000mAh, the size that suits a charger carried every day rather than one packed for long trips. It covers a full day of navigation, calls and camera use on a phone, which is the pattern most people actually need portable power for.

The BOLT-10PD is specified for smartphones and tablets rather than a single device class. That matters for anyone carrying both, because a tablet and a phone rarely run down at the same time and one charger that serves either avoids carrying a second pack for the sake of a connector.

This version is finished in white, which suits a desk or bedside setup built around lighter surfaces. Promate describes the charger as universal, and between the USB-C and Quick Charge outputs it covers the mix of phones and tablets most households already run day to day.