Overview
The Anker 737 Power Bank (PowerCore 24K) is a high-output portable battery for people who need to charge more than a phone. It combines a 24,000mAh battery with two USB-C ports and one USB-A port, making it suitable for a laptop, tablet, handheld gaming device, or a collection of smaller electronics. Its maximum USB-C output is 140W with compatible equipment. That makes it substantially more capable than a basic phone power bank, though the benefit depends on what your devices can actually accept.
A built-in display shows battery status and charging information, including power flowing into or out of the bank. This is useful for checking whether a laptop is receiving meaningful power or whether a cable is limiting charging speed. The display is a practical differentiator, but the bigger purchasing considerations are output capability, physical size, and price. This is a substantial battery pack rather than an everyday pocket accessory, and shoppers should compare the exact PowerCore 24K version rather than relying on the Anker 737 name alone.
Who it's for
The strongest fit is a traveler, commuter, or remote worker using a USB-C laptop away from outlets. It also suits someone charging a tablet and phone during a long day, or extending playtime on a USB-C handheld console. Higher output can help keep a compatible laptop running under load, although runtime depends heavily on the computer, workload, and charging losses. Its capacity should not be interpreted as a guaranteed number of full laptop charges.
For phone-only use, a smaller and less expensive battery is usually easier to carry. This model makes more sense when you regularly benefit from laptop charging or want visibility into charging behavior. Buyers who prioritize effortless portability over output should compare slimmer alternatives before paying for capabilities their devices will not use.
Things to know before buying
The 140W figure is a maximum, not a promise that every connected device will charge at that rate. Reaching it requires a compatible USB Power Delivery 3.1 device and an appropriately rated cable. Some laptops need a manufacturer-specific connection to reach their highest charging speed. When several devices are connected, power is shared, so check the port-allocation information against your intended combination. A suitable wall charger is also needed for fast recharging of the bank itself; verify the retailer's package contents.
Its 86.4Wh battery falls below the usual 100Wh airline threshold, but airline rules still govern where and how it can travel. Carry power banks in cabin baggage and check your carrier's current restrictions, including onboard use. For US purchases, compare new-unit prices, seller authorization, return policies, and warranty eligibility. Distinguish this older PowerCore 24K model from newer Anker batteries with similar capacities and different output ratings.