Which output better for charge Ravpower power bank 28600mah rp-pb41

[wp patrick]

I am using a ravpower powerbank 28600mah rp-pb41. I see different outputs on rav which one better for use charge powerbank. The power bank has micro-usb input (2.1a max) ismart usb output (2.4a max) ismart usb output (2.1a max) and ismart 1a max. Which one better for use to charge rav powerbank. Last question what is duration time for charge my rav power bank 26800mah. Is there a different in use of several output and which better for charge powerbank.

 

[Kodak2]

From your description you only have only 1 choice for charging the powerbank, that is the micro usb input, all the other ports you are saying are outputs. If you are asking which output should you use for charging your phone then I would read the user manual or failing that use the ismart usb output 2.4a max. You can't use an output port to charge the powerbank!

PS. Powerbanks do charge slowly, overnight is the best option.