[Casius]

The battle system in this game seems so random that its hard to tell if the belts do much or not. Just by eye-balling I would say the returns are minimal at best.

I've thought about testing this to see exactly what help they do, but to do that, the sample space would have to be HUGE. Probably need around 1000+ attacks on a single target with static variables (hp, happiness, ect.)

My bet would be after all that testing, the return on dmg mitigation would be somewhere around 1-2%, if that.

To answer the OP, your paying for it to be charged and the commodity to not have to charge it again for an extended period of time. If it was a straight 2x's longer charge for 2x's the money, you would never choose the shorter charge.