I would evaluate how long Alkaline would last, how long Eneloop’s would last, how long Energizer lithium would last. Alkaline batteries are dirt cheap and dont require recharging. Its not only an issue of cost, its also an issue of convenience . It does not seem like 1.5V AA/AAA lithium rechargeable batteries have much of a market. This is why the only brands available are of the Deleepow type which is probably a chinese sweat shop .