Will it supply power to plugged-in devices (eg. phones) while it is being charged itself?

Not a good idea dude.Here's the answer: "If you've noticed that the PowerCore doesn't charge while you have devices connected to it that are charging, that's because it's not possible to do that. This is not good for the battery, and as a result Anker doesn't make it possible for the user to do that."Source: https://turbofuture.com/misc/Troubleshooting-Anker-PowerCore-Portable-Charger-Problems

Will the charger automatically start charging my iphone when i plug it in if i don't press the power button on the charger?

These power banks charge automatically once your cable is connected. I have the anker 20100 and was money well spent. I rarely use the mains for my phone and just use the power bank to keep it conditioned. highly recommended, I've found the anker 6ft charge cables handy and good quality also.

how does this power bank charge?

There are 2 micro USB Ports on the charger......if you use both to charge the Anker Power Bank it will charge up in roughly in half the time....they are supplied but not the plugin....

Would this item power a GoPro Hero 5?

Of course it will charge the Hero 5 and it will also charge it at the full 2 amps of current as long as you don't try to charge multiple items at the same time as in if you need to charge 3 usb items at the same time the current will be reduced so they all will charge but charge time of 3 items will take longer. But as I said already if you are just charging the gopro on its own then you will not have any issues, the the powerbank has spades/loads of spare power to charge it again

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337 Power Bank (PowerCore 26K) 26800mAh Power Bank External Battery with Dual Input Charging Port, Quick Rechargeable, 3 USB Ports for iPhone 16/15/14/XR/XS/X/8/7, iPad, Samsung Galaxy, and More

Product ID: 47996206

Details

Battery capacity
26800 Milliamp
Brand
Anker
Colour
Black
Connector type
Micro USB
Special feature
Fast Charging

⚡Dual input 2X recharge speed

🔋26800mAh colossal capacity

🔌3 USB ports, 6A max output

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$153.35

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Description

🔋 Stay powered, stay unstoppable — never miss a moment!

TRUSTED BY MILLIONS - Join 50M+ users who rely on Anker’s industry-leading technology and 18-month warranty.
TRIPLE DEVICE CHARGING - Simultaneously power up 3 devices with smart PowerIQ tech delivering max 6A output.
LIGHTNING FAST RECHARGE - Dual Micro USB inputs cut your power bank’s recharge time in half—ready in just 6 hours.
SAFETY MEETS PERFORMANCE - MultiProtect system and heat dissipation keep your devices and power bank safe and cool.
POWER THAT LASTS ALL DAY AND BEYOND - Charge your phone 6+ times or tablet twice without a hitch.

The Anker PowerCore 26800mAh is a powerhouse portable charger featuring massive battery capacity to charge multiple devices multiple times, triple USB ports with smart high-speed charging, and dual input ports that recharge the bank twice as fast. Designed with advanced safety features and trusted by over 50 million users, it’s the ultimate companion for busy professionals and tech-savvy millennials who demand reliable, fast, and safe power on the go.

Specifications

ASIN	B01JIWQPMW
Amperage	6 Amps
Antenna Location	iPad, iPhone, tablets
Battery Capacity	26800 Milliamp Hours
Battery Cell Type	Lithium Ion
Battery Charge Time	6 Hours
Battery Weight	398 Grams
Best Sellers Rank	135 in Mobile Phone Portable Power Banks
Box Contents	Battery.
Brand Name	Anker
Colour	Black
Compatible Devices	Smartphone
Compatible Phone Models	iPhone 8, Iphone X, Iphone XS, Iphone XS Max, Iphone XR, Nexus 7, Android Phones with USB C Port
Connector Type	Micro USB
Country of Origin	China
Customer Reviews	4.6 4.6 out of 5 stars (40,803)
Global Trade Identification Number	00848061039238
Is Electric	No
Item Dimensions	18 x 8.1 x 2.3 centimetres
Item Dimensions L x W x Thickness	18L x 8.2W x 2.2Th centimetres
Item Weight	495 Grams
Manufacturer	Anker
Manufacturer Part Number	AK-848061039238
Model Name	galaxy
Model Number	A1277
Number of Batteries	1 CR5 batteries required.
Number of Items	1
Number of Outlets	3
Number of Ports	5
Other Special Features of the Product	Fast Charging
Output Current	3 Amps
Portable	No
Power Source	Battery powered, Corded Electric
Product Warranty	18-month
Reusability	Rechargeable
UPC	848061039238
Unit Count	1.0 count
Voltage	5 Volts
Warranty Type	Limited

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