I tend to agree with you and will always keep a supply of Panasonic CR123's on hand from battery junction, but so far I've had excellent luck with the 18650 Li-Ion rechargeables I got from Lumaforce. They specifically call for them over the CR123's for Cree XML LED. So far, they seem to outlast the CR123's and I've had one sit for up to 6 months with no appreciable loss of charge. I tend to use three lights daily, this one, a Fenix LD-10 and a Terralux LED, both of which use Energizer rechargeables. I rely on rechargeables for my everyday use lights, or my monthly battery bill would be staggering!