This graph, which shows the disposable producing more light (for the first hr) as I said, would also be more illuminating (pun intended) if it included rechargeables after 1, 2, 5, 10, 50, 100, etc charges (if they still functioned at all that is). This is the only way cost per use could be realistically analyzed. Considering the eneloops cost 6 times the price not including the charger, then factor in the run time loss with each subsequent charge it might suprise you.