So I wasted my money. Will 2000mah still give me decent battery life?
No you did not waste money buying authentic quality cells, not at all.
I can't say for sure how long they'll last between recharge cycles, too many unknown factors to give an accurate answer.
As many as you bought sounds like you'll have plenty sets all charged up waiting in a protective case to be exchanged when necessary.
Just me, the only money you wasted was on the low quality rewrap cells & the hexohm v3.