a 2200mah 3s lipo would be more than enough for a 3 minute fight on two drills and a lifter, would weigh next to nothing and provide much more power than the sla could ever hope to.
I ran Loki for three fights at Yeovil on 4 drills and a lifter on a 2200 mAh 5s lipo without charging it and it was fine (admittedly I didn't last very long in those fights, what with magic smoke and being oota'd and having the link knocked out but still...)
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