How Many Times Does 20000mAh Charge a GoPro HERO11?
Updated 2026-08-18 · Power Bank Guide
When you ask how many times does 20000mAh charge GoPro HERO11, the answer depends on the battery’s actual capacity, conversion efficiency, and the camera’s power draw. A 20000mAh (≈74 Wh) portable charger is well within the TSA/FAA 100 Wh carry‑on limit, making it a practical travel companion for the HERO11 and a host of other gadgets.
Understanding the 20000mAh Rating
Most power banks list capacity in milliamp‑hours at the internal lithium‑ion voltage of 3.7 V. To get watt‑hours, multiply mAh by 3.7 V and divide by 1000:
- 20000 mAh × 3.7 V ÷ 1000 = 74 Wh
Real‑world output is lower because of conversion loss. A typical USB‑C PD bank is about 60‑70 % efficient, so you can expect roughly 44‑52 Wh of usable energy.
How Many HERO11 Charges?
The GoPro HERO11 Black ships with a 1720 mAh (≈6.2 Wh) battery. Assuming 65 % efficiency, the usable energy from the 20000 mAh bank is about 45 Wh. Divide that by the camera’s battery:
- 45 Wh ÷ 6.2 Wh ≈ 7.2 full charges
In practice you’ll see 6‑7 charges, depending on temperature and how much power the camera draws while recording at high resolutions.
What a 22.5W USB‑C PD Bank Can Power
At 22.5 W, the bank can charge most smartphones and smaller tablets quickly (5 V / 3 A or 9 V / 2.5 A). It can also top‑off larger devices, but it won’t provide full‑speed charging for power‑hungry laptops that require 45 W or more. Here’s a quick rundown:
- Smartphones: 2‑4 full charges (iPhone 17, Samsung Galaxy, Google Pixel).
- Tablets & iPad: 1‑2 charges (iPad Mini, 8‑inch iPad).
- Gaming handhelds: Roughly 1 charge for a Nintendo Switch in handheld mode (≈15 Wh), or half a charge for a Steam Deck (≈35 Wh).
- Compact laptops: Can provide a 15‑minute boost to laptops that accept USB‑C PD up to 30 W, but not a full charge.
- Earbuds & smartwatches: 5‑10 charges, because those batteries are under 1 Wh each.
Because the bank’s output caps at 22.5 W, any device that requests more will simply charge slower or stop once the bank’s limit is reached.
Why the INIU 20000mAh Portable Charger Is a Good Fit
The INIU 20000mAh Portable Charger (Flight‑Safe) combines the 74 Wh capacity with a 22.5 W USB‑C PD output, making it ideal for the HERO11 and the other gadgets listed above. Its TSA‑approved rating means you can keep it in your carry‑on, and the included USB‑C cable and flashlight add convenience on the road.
Tips for Getting the Most Out of Your 20000mAh Bank
1. Start with a full charge. Plug the bank into a wall adapter that can deliver at least 22.5 W; a 65 W USB‑C charger will fill it faster than a 5 W phone charger.
2. Avoid deep discharge. Lithium‑ion cells last longer when you keep the voltage above 3.3 V, so try not to run the bank to 0 %.
3. Use the right cable. For PD charging, a USB‑C to USB‑C cable rated for 5 A will deliver the full 22.5 W. The included cable with the INIU charger meets this spec.
4. Prioritize high‑draw devices. If you need to charge a Switch or Steam Deck, do it first; the bank’s capacity will diminish faster when delivering higher wattage.
FAQ
Is a 20000mAh power bank allowed in airplane cabins?
Yes. At 74 Wh it falls under the 100 Wh limit most airlines enforce for carry‑on batteries. Always verify the latest airline policy before traveling.
Can I use the 22.5W output to charge a laptop that requires 45W?
No. The bank will either charge very slowly or stop once it reaches its 22.5 W ceiling. For full‑speed laptop charging you need a bank with at least 45W PD output.
How many times can the same 20000mAh bank charge a GoPro HERO11 compared to an iPhone?
The HERO11’s 6.2 Wh battery yields about 6‑7 charges, while an iPhone 17 (≈5 Wh) gets roughly 8‑9 charges, assuming the same 65 % efficiency.