Has anyone used it to charge a laptop?

I have. I got a pretty decent charge from it

Can I use it in any part of the world?

Yes. I’ve taken it everywhere with me. Just make sure you have your adapter

How do you activate "always on" mode?

I own a previous Xiaomi 20,000mah power bank that had that mode to charge/ power devices that draw too little current to keep ordinary power banks on. I do not know if this power bank has that feature. On the older power bank I own always on mode is engaged by pressing the power button twice. All the charge indicator lights will blink. I think it stays on for two hours at a time in this mode. I found this mode invaluable for charging my juul vape pen. It would also come in handy for something like string lights. More power banks should really include this feature.

Unit Count	1 Count
Battery Cell Type	Lithium Polymer
Recommended Uses For Product	Iphone,Tablets
Compatible Devices	android,iphone
Voltage	5.1 Volts
Power Source	Battery Powered
Amperage	3.6 Amps
Number of Ports	2
Battery Capacity	10000 Milliamp Hours
Additional Features	Fast

XIAOMI20000mAh Redmi Power Bank, Fast Charge, Two-Way 18W Fast Charge, Dual Input and Output Ports, 74Wh High Capacity, External Battery Pack Compatible with iPhone, Samsung, Android Devices

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