What would be the reason that one model of wireless earphones would have worse battery wear-out than another? Wouldn't it depend almost entirely on how many rec

What would be the reason that one model of wireless earphones would have worse battery wear-out than another? Wouldn't it depend almost entirely on how many recharge cycles the battery gets? If so, then I suppose it would only depend on the battery life of the earphones (if we hold the usage rate constant).