How to Recharge an Anker 737 Between Classes or Meetings

To recharge an Anker 737 Power Bank (PowerCore 24K, model A1289), connect a suitable wall charger and USB-C cable to USB-C1. USB-C2 is output-only: it can charge another device, but it cannot refill the power bank. Check the input indication before walking away.

By DigiDevice Editorial

You finish a class or a meeting with a nearly empty power bank and an outlet available for a short break. Plugging it in is only the first step. You also need the correct port, a suitable charger and cable, and a realistic idea of when you will need it again. Here is how to make that recharge window useful.

Find the input port before choosing a cable

The Anker 737 Power Bank (PowerCore 24K) has two USB-C ports, but they do different jobs when the bank itself needs power. Anker identifies USB-C1 as input/output and USB-C2 as output-only in its port guidance for model A1289.

This distinction matters at a busy desk: a cable fitting the socket is not confirmation that the battery is recharging. Read the port label, connect the charger to C1, and check the display. If you own another power-bank model, use its own manual rather than applying the 737’s port arrangement to it.

Choose equipment for recharging the bank

Separate two questions: what can the power bank deliver to your devices, and what equipment does it need to recharge itself? For A1289, Anker’s recharging guidance names the A2148 and A2341 wall chargers and recommends the supplied USB-C-to-USB-C cable. Confirm your exact equipment against that guidance before relying on a short charging break.

If the original cable is missing, check a replacement’s documented charging support rather than selecting it by connector shape alone. Likewise, record the wall charger’s model number; a charger borrowed from a colleague may serve a different purpose. Ask the manufacturer about an uncertain combination before buying replacement equipment.

Give the break a realistic goal

Anker estimates approximately 1.5 hours with the A2148 charger and approximately one hour with the A2341 in that recharging guide. These are manufacturer estimates for the named setups, not a promise that any outlet-and-cable combination will refill the bank during lunch.

For a short gap between classes, note the starting battery percentage and the time you connect it. Check again before your next session. That gives you a record of what your actual setup achieved without turning a brief observation into a claimed charging-speed test. If the remaining charge is lower than you need, plan access to another outlet rather than assuming the bank will cover the rest of the day.

Do not leave the settings screen running

After checking the status, avoid leaving the settings selection screen continuously active. Anker’s A1289 product FAQ says that this screen consumes power and recommends turning the display off when it is not in use. Follow the model’s controls rather than keeping a status screen lit throughout your work session.

Before the next class or meeting

• Confirm the exact power-bank model and its designated input port.
• Use a charger and cable supported by the manufacturer’s guidance.
• Check that the display indicates input after connecting.
• Record the starting percentage and check the result before leaving.
• Do not plan around a recharge-time claim for equipment you are not using.
• Pack the cable needed for your next device, not just the one used to refill the bank.

If you are comparing portable power for work or study, review the Anker 737 listing alongside its input requirements. A power bank’s usefulness depends partly on whether your schedule and charging equipment can keep it ready for the next session.

Related guide

Read our guide to plan a household charging station.