Our take
Shortlist the Anker 737 if you need a power bank for a laptop that can use its USB-C output and you have checked the whole charging chain. It is a less persuasive purchase for someone who only wants a light emergency phone top-up. The largest number on the box is useful only when the devices and cables can take advantage of it.
A work bag carrying a compatible USB-C laptop and charging accessories.
A buyer choosing primarily for pocket size, someone expecting 140W from every port simultaneously, or a laptop that needs an incompatible proprietary charging method.
Pros & cons
Practical implications of the documented features.
What works in its favor
- Two USB-C ports and one USB-A port offer several connection choices.
- The display gives visibility into charging information.
- Its documented maximum output can address compatible high-power USB-C charging needs.
What to weigh up
- The maximum output is conditional on device and cable support.
- Multiple connected devices share the total power budget.
- A larger-capacity power bank also occupies space alongside the cables and wall charger in your bag.
The key details
| Model covered | A1289 |
|---|---|
| Capacity | 24,000mAh stated capacity |
| USB ports | 2 USB-C + 1 USB-A |
| Maximum output | 140W total maximum |
| Amazon US ASIN | B09VPHVT2Z |
Performance figures are manufacturer claims. Source checked September 16, 2026. Regional models and included accessories can differ.
What the features mean for you
Check the laptop before choosing the power bank
Start with your laptop’s own charging documentation. Identify the accepted input protocol and power level, then check the cable you will use. Anker states that reaching the headline 140W requires a PD 3.1-capable device and cable. A USB-C connector by itself is not proof of that support. If you cannot establish compatibility, choose on the basis of confirmed requirements rather than hoping the larger advertised output will solve the mismatch.
Plan the simultaneous charging setup
Imagine the actual combination you intend to plug in: a laptop, a phone, and perhaps another accessory. The product’s total power budget is not a separate allowance for every device. Decide which device needs priority and whether the others can wait. This is especially useful if the laptop will be working while charging. We have not measured the power delivered to a specific combination and do not promise that every laptop will maintain its charge under every workload.
Capacity is not a guaranteed count of full charges
Use the capacity figure to identify the model, then consider your own battery size and workload. Avoid assuming a fixed number of full laptop or phone charges from the printed mAh figure alone. We have not run an energy-delivery test. For an important work session, plan enough margin and keep an alternative charging option available instead of treating an untested estimate as a schedule guarantee.
Remember that the power bank also needs charging
The wall adapter and cable affect how conveniently you can refill a high-power bank. Anker publishes recharge examples with suitable adapters, but those examples are not a promise for the charger already in your drawer. Check its label and supported output modes. Include any missing charger or cable in your purchase calculation. If you usually have access to a wall outlet, also compare whether carrying a suitable wall charger would meet the same need with less equipment.
Decide whether this belongs in your bag
Choose this model around a concrete use case, such as keeping a compatible laptop available between outlets. For a short journey with only a phone, a smaller bank may be easier to carry. The display can help you see what is happening, but it does not replace testing your own setup before relying on it. Our recommendation is based on documented capability and these trade-offs, not on a measured endurance ranking.
What else to compare
For phone-only use, compare a smaller power bank. For desk work near an outlet, compare a compatible wall charger. For a laptop, evaluate confirmed USB-C requirements before deciding which capacity and power rating make sense.
Explore this category →Before you buy
Does each USB-C port supply 140W at the same time?
No. Anker lists 140W as the total maximum; simultaneous connections share the available output.
Will it charge any laptop with a USB-C socket?
Do not assume so. Verify the laptop’s charging protocol and accepted input, as well as the cable rating. A connector shape alone is not sufficient.
How many full charges will I get?
We have not measured that. It depends on the device and use conditions, so we do not publish an untested full-charge count.
Does this review cover the Anker 737 wall charger?
No. This page covers the A1289 PowerCore 24K power bank. Check the model because the 737 name also appears on other Anker products.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources & review basis
We use the following manufacturer documentation for the product features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- Anker US A1289 product specifications and FAQ ↗ — checked September 16, 2026.
- Anker A1289 technical introduction and port sharing ↗ — checked September 16, 2026.
- Anker charging-adapter and recharge guidance ↗ — checked September 16, 2026.
- Amazon US model listing checked September 16, 2026; current condition, price, and availability are confirmed by the seller.
Is it the right fit?
Check the exact model and today’s offers on Amazon.