What is the difference between the Circle-K and Lawson Power Cube?

Both of these Power Cubes have the same description:

Enhanced Power Cube that provides large XM storage and automatically recharges Scanner until exhausted.

My Questions:

1. Is there any difference between these two power cubes?
2. How much Power is initially provided?
3. Is the "automatically recharged" XM limited by time or by XM amount?

Solution 1:

I tried it now for this post.

There is no difference. Just the name. Some companies sponsor NIA for some Ad.

AXA, Lawson, Soft Bank, etc...

The effect of this power cube is exactly the same as Lawson PC.

Keep it for anomalies (in MUFG), when you need to recharge target / volatile portals.

EDIT

Here is a link, where you can figure out how much XM will you get. It is based on your level.

https://fevgames.net/ingress/ingress-guide/items/power-cube/