How to buy the best power bank

Article by Peter Zaluzny…
Just a comment regarding power capacity chapter in the article:
Capacity is measured by WH (watt/hour) and not AMP - unless you know the voltage.
Most Airlines for example, will nominate the max capacity for carry on batteries in WH which is the AMP/H x Voltage for example a power tool battery of 5A/18V have a capacity of 90WH (5x18) and is quite close to the max. capacity allowed on board (usually 100WH).
Most branded power banks are showing the AMP/H (or mAH) measured on 3.7V but unless the WH is stated, they can always claim that the AMP/H has been tested on much lower voltage…
This is the reason you can see many unbranded batteries online with ridicules claims like 200,000mAH.
I understand the reason behind your decision to nominate the AH as capacity, since most power banks are doing the same, but this explanation should be included so buyers will understand that suppliers are not necessarily lying when claiming high AH capacity, but being a bit deceiving.

A post was merged into an existing topic: Pocketable Powerbanks Tests