Overview
The Anker 737 Power Bank (A1289), also called the PowerCore 24K, is a 24,000mAh portable battery designed for phones, tablets, and compatible USB-C laptops. It has two USB-C ports and one USB-A port, with up to 140W output available through a single USB-C connection. Its screen shows battery status and charging information, making it easier to see whether a connected device is actually drawing substantial power. For the broad search “Anker power bank,” this is a laptop-focused option rather than a lightweight everyday phone charger.
The main attraction is the combination of substantial capacity, high USB-C power, and useful charging feedback. The main compromise is bulk: at approximately 632 grams, it belongs in a backpack rather than a trouser pocket. Its 24,000mAh rating describes the internal cells, not the amount delivered directly to your device. Voltage conversion and charging losses reduce usable energy, so exact phone recharge counts depend on the phone, cable, temperature, and whether you keep using it while charging.
Who it's for
This model suits commuters, students, and travelers who want one battery for a USB-C laptop and smaller electronics. It is particularly useful when a phone-oriented power bank cannot supply enough wattage to keep a laptop running comfortably. Charging a laptop away from an outlet, topping up a tablet between meetings, or sharing power with another traveler are more compelling reasons to buy it than simply needing an occasional emergency phone recharge.
It is less suitable for buyers prioritizing minimum weight, wireless charging, or a built-in cable. A smaller Anker battery is usually easier to carry if your only device is a phone. Laptop owners should check their machine’s USB-C charging requirements before buying: a high advertised output does not mean every laptop can accept that power, and some gaming laptops still need their proprietary adapters for full performance.
Things to know before buying
The 140W headline requires compatible USB Power Delivery 3.1 equipment and an appropriately rated cable. Power is shared when multiple devices are connected, so do not expect every port to deliver the single-port maximum simultaneously. Fast recharging also requires a sufficiently powerful wall charger; check the listing’s contents rather than assuming one is included. The USB-A port is useful for older accessories but is not the route to high-power laptop charging.
Its 86.4Wh battery is below the usual 100Wh airline threshold, but spare lithium batteries generally belong in carry-on baggage, and airline-specific restrictions still apply. Compare new-unit listings using model number A1289 because Anker also uses “737” on a wall charger. Check the seller, warranty eligibility, return policy, and included cable, especially when a marketplace price is substantially lower than established retailers.