baterry

New mod on the way. 150 tesla touch. Now i need to choose batteries. I want good bat life. All day would n nice. It maxes out at 150w but rarely come close to vaping at 100w. Any suggestions are appreciated.

I bought new batteries for my kangertech five6 but 2 of them are 2600 mah, 2 are 2500 mah, and the last one is 2000 mah. Can I use them together or do they need to be the same?

Do i have 4 25R baterries.. And I bought one more for the releaux rx 2/3. They are married in pairs. Can i marry the new Baterry with one Of the pairs? In other words, can i marry the new baterry with 2 batteries that I already own?