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Right now yes.
A power bank cost about 20,000 naira and it would last for atleast a year
To power my generator for two weeks would cost 20,000naira
My light bill is around 20,000 a month
Minimum wage is around 35,000 naira

That sounds pretty good. Wouldn't it also cost you some electricity, but I see the point and it is cheaper than a generator.

The electricity cost is quite insignificant. The batteries are around 27000MaH, and it can charge my phone 3-4 times.

Working off your phone? I can't seem to get used to using my phone for most things. I like using my Desktop.

My phone is more convenient but I also enjoy working on my phone. It allows me to multitask.