Manufacturer research Specifications checked 2026-10-25 US model

Anker 737 Power Bank (PowerCore 24K), A1289

Anker A1289 is a high-output 24,000mAh USB power bank for compatible USB-C laptops and mobile devices. Its two USB-C ports and one USB-A port share a 140W total ceiling; it provides no household AC output.

Nominal stored energy: Not verified in this source record Manufacturer source for Nominal stored energy (checked 2026-10-25; opens in a new tab)
Maximum single-port output: 140 W Manufacturer source for Maximum single-port output (checked 2026-10-25; opens in a new tab)
Listed weight: 630 g Manufacturer source for Listed weight (checked 2026-10-25; opens in a new tab)

See all specifications and sources

Is it right for your household?

Where it fits

A compatible USB-C laptop or device needing up to 140W from one port, with a suitable PD 3.1 cable.

When to consider another option

Household AC loads, more than 140W aggregate output, or devices without compatible USB charging.

Manufacturer specification record · No hands-on testing · Source records checked on 2026-10-25

Confirm the exact model and protocol

Anker's U.S. product page identifies the 737 Power Bank, model A1289, with 24,000 mAh, two USB-C ports, and one USB-A port. Its FAQ says reaching 140 W requires both a PD 3.1 capable device and cable. A device that uses a lower charging protocol will not necessarily draw 140 W, so check the device's input and cable rating before relying on that maximum.

Understand port sharing

Anker lists 140 W maximum total output. A single USB-C port can reach up to 140 W under supported conditions, but connecting other devices does not create additional capacity; total output remains bounded. Use Anker's port-combination charging guide and the power bank's display for the connected configuration rather than adding each port's top-line maximum.

Anker U.S. A1289 page (opens in a new tab)

Use the display as status information, not a runtime promise

The A1289 screen reports battery percentage, recharge-time estimate, and port input/output. Anker says displayed figures are based on factory or lab testing and may vary by device and conditions. The page lists 630 g; its U.S. specifications do not state watt-hours, so this record leaves nominal energy in Wh unknown rather than converting mAh using an unstated cell voltage.

Anker U.S. A1289 specifications and FAQ (opens in a new tab)

Keep it in the USB-device role

The A1289 is a USB power bank, not an AC inverter or a home battery. It can charge compatible USB devices, but it cannot directly run AC appliances. Anker's user-guide article is available, though the English PDF was not directly read in this research; no operating or battery-safety procedures are supplied here.

Start with your household

Check energy and shared USB output against your devices

Match the device's supported USB charging protocol, required input watts, and cable. A single-port maximum is not the simultaneous total: compare both fields where multiple devices will be connected. Use stated Wh for energy comparisons; do not convert mAh to Wh unless the manufacturer's voltage basis is provided. Power banks provide USB output, not household AC power. Device charge counts vary and are not inferred here.

Choose a power bank for your charging task

Before you buy

Use this checklist when reviewing the exact model and bundle.

Verify exact model/generation and supported USB-C/USB-A protocols on the device and bank.
Compare the bank's single-port maximum with its separate simultaneous total-output limit.
Check whether the manufacturer states Wh; do not infer delivered phone charges from mAh alone.
Keep a separate plan for AC appliances and follow the exact model's current instructions for charging and storage.

Specifications & sources

These are manufacturer specifications, not independent performance measurements. Source records checked on 2026-10-25. We have not tested this model hands-on.

Nominal stored energy

Not verified in this source record

U.S. page states 24,000 mAh but not Wh or cell voltage; no conversion inferred.

Checked 2026-10-25. Source for Nominal stored energy (opens in a new tab)

Maximum single-port output

140 W

USB-C1; requires compatible PD 3.1 device and cable per Anker FAQ.

Checked 2026-10-25. Source for Maximum single-port output (opens in a new tab)

Listed weight

630 g

Checked 2026-10-25. Source for Listed weight (opens in a new tab)

Manufacturer battery capacity

24,000 mAh

Checked 2026-10-25. Source for Manufacturer battery capacity (opens in a new tab)

Ports

2 USB-C (C1 input/output, C2 output) and 1 USB-A

Checked 2026-10-25. Source for Ports (opens in a new tab)

Maximum total simultaneous output

140 W

Maximum total across connected outputs.

Checked 2026-10-25. Source for Maximum total simultaneous output (opens in a new tab)

Recharge input

USB-C1, up to 140 W

Checked 2026-10-25. Source for Recharge input (opens in a new tab)

Water rating

Not verified in this source record

No water rating established.

Checked 2026-10-25. Source for Water rating (opens in a new tab)

Listed recharge time

About 1 h with compatible 100 W charger

Manufacturer support statement; no HRH measurement.

Checked 2026-10-25. Source for Listed recharge time (opens in a new tab)

Battery type

Internal rechargeable lithium-ion; Wh left unknown

Checked 2026-10-25. Source for Battery type (opens in a new tab)

Research notes & original documents

Manufacturer product page Anker A1289 guide listing and support description reviewed; English PDF not opened. No operational procedures claimed. How we research equipment