Question 1

What devices can this power bank charge, and how fast is the "87W" charging?**

Accepted Answer

This Anker pack is a versatile powerhouse. The 87W total output means you can simultaneously charge a MacBook or Windows ultrabook via the USB-C port, a phone on the second USB-C port, and a pair of earbuds via the USB-A port. While it can top up iPhones and Samsung Galaxy devices at their maximum wired speeds, the 87W budget is shared across all ports. For the fastest laptop charging, we recommend plugging your laptop in alone or with a small device like earbuds to reserve full power for the big device.

Question 2

I keep seeing the "20,000mAh" rating. Does that mean I can charge my phone 7-8 times?**

Accepted Answer

Not quite—and that's the most common misconception we see in user comments. The 20,000mAh rating refers to the battery cell capacity, but energy is lost during the voltage conversion process. In real-world usage, you can expect to recharge a modern smartphone (approx. 3,000-4,000mAh battery) roughly **3 to 4 times** from a full charge. It’s more than enough for a weekend trip, and it will fully charge a tablet or a Nintendo Switch about 2 to 3 times.

Question 3

Is this power bank safe to bring on an airplane? Is it too big for travel?**

Accepted Answer

Yes, this is a TSA-approved travel essential. Most airlines allow power banks up to 27,000mAh in carry-on luggage, and since this sits comfortably at 20,000mAh, you are good to go. That said, many Reddit users note that it is heavier and bulkier than they expected—this is a "luggage charger," not a "pocket charger." If you need something to slip into a jean pocket, look at a 10,000mAh slim model instead. But for backpack travel, the capacity and speed this offers are well worth the weight.

Question 4

Can I charge the Anker Power Bank and my phone at the same time (pass-through charging)?**

Accepted Answer

Absolutely. You can plug the Anker power bank into a wall outlet to recharge its internal battery while simultaneously using the other ports to charge your phone or other devices. This is a great feature for saving time at the airport or hotel. Keep in mind that the charging speed to your phone might be slightly slower during pass-through, but it’s a reliable and safe feature to use.

Question 5

The lights on the side show the battery level, but they seem a little vague. Is there a way to tell the exact percentage?**

Accepted Answer

We understand the feedback here; the LED indicators can be a bit ambiguous regarding the exact remaining charge. The four lights do not give you an exact percentage—they simply give you a general range (e.g., one light means 0-25%, four lights means 75-100%). Many users on TikTok have noted that while this is slightly imprecise compared to a digital readout, the power delivery remains consistent even when the last light is flickering, so you won't be left stranded without warning. It’s a minor trade-off for the reliability and price point.

Anker Power Bank, 20,000mAh, 3-Port 87W Fast Charging, Built-in USB-C | Travel Essential Battery Pack, for iPhone 17/16/15 Series, Samsung, Switch and More (Black)

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