I am currently building a robotic arm that runs 5 motors on 2x18650 high discharge batteries. The motors run at 6V (Voltage is regulated) and Stall at 1A each (Total max intermittent current draw is ~5A)

I am currently using the 2 18650 cells in series to get 7.4V and a voltage regulator to supply 6V to the motors. However, I have been suggested that Connecting the cells in parallel and boosting the voltage might be better? I am confused as I am under the impression that boost converting is usually less efficient than buck converting which is what I'm doing currently.

Most conversations I read point out the fact that the choice of series vs parallel+boost is very situation dependent, so I would like to know what reasons would make parallel+boost better for this scenario if any?

I am currently building a robotic arm that runs five motors on two 18650 high discharge batteries. The motors run at 6V (the voltage is regulated.) The stall current is 1A each. (The total maximum intermittent current draw is ~5A.)

I am currently using the two 18650 cells in series to get 7.4V and a voltage regulator to supply 6V to the motors. It has been suggested that connecting the cells in parallel and boosting the voltage might be better. I am confused as I am under the impression that boost converting is usually less efficient than buck converting which is what I'm doing currently.

Most conversations I read point out the fact that the choice of series vs parallel+boost is very situation dependent, so I would like to know what reasons would make parallel+boost better for this scenario if any.