Cells for powerbanks

[awol]

A good while ago I made several phone charging power-banks with old cells out of my used bottle battery.

They proved popular with the family but a couple got lost, one died and the rest don't really last long. I also got one of those 18650 bike battery power-banks to try but have no decent old cells leftover.

So I am thinking of replacing the cells with new ones, I don't think the cells need to be the usual high amp power output as bike batteries need but last longer as I would like to use the 2x18650 phone charging power-banks as they will be lighter to carry about.
So which cells will be best for this use, lower power output but last longer?

 

[soundwave]

https://www.bga-reworking.co.uk/e-bike-batteries/panasonic-ncr18650b-3400mah-li-ion-battery-flat-top-unprotected.html

 

[awol]

https://www.bga-reworking.co.uk/e-bike-batteries/panasonic-ncr18650b-3400mah-li-ion-battery-flat-top-unprotected.html

Do you know if that's 11.50 each or for 2 as the pic?

 

[soundwave]

i think it is for 2 as about 5 quid each on ebay what i paid for all mine.
https://www.ebay.co.uk/itm/2x-Genuine-Panasonic-18650-3400mAh-Rechargeable-Battery-NCR18650B-Vape-UK-Stock/322910484140?epid=13010915236&hash=item4b2ef6f6ac:g:rEYAAOSwsYpZ-8Yy

 

[awol]

i think it is for 2 as about 5 quid each on ebay what i paid for all mine.
https://www.ebay.co.uk/itm/2x-Genuine-Panasonic-18650-3400mAh-Rechargeable-Battery-NCR18650B-Vape-UK-Stock/322910484140?epid=13010915236&hash=item4b2ef6f6ac:g:rEYAAOSwsYpZ-8Yy

I see there's loads available claiming to be genuine cells so to make sure I find genuine cells which supplier do you use? (jimmy's out of stock)

 

[soundwave]

the seller i got them from no longer sells them but as long as there not sent via china and get them from like a vape shop then should be ok as can tell buy how heavy they are if you cant test them?

 

[soundwave]

 

[soundwave]

 

[Deleted member 4366]

These cells are genuine and about the best value in terms of mAh per pound:
https://eu.nkon.nl/rechargeable/18650-size/samsung-inr18650-29e.html