I just acquired my first light that uses a 18650. It is a Fenix CL25R lantern. The light has a built in charger and the battery that ships with the light is a Fenix ARB-L2M 18650 3.6V 2300 mAh Li-Ion with protection circuit. The instructions with the light state "We recommend a power adapter with output over 5V, 1.5A. Cord that comes with the light is a micro USB on one end and a standard on the other. Question, am I OK using my Apple Iphone charger that is 5V and 1A? Thanks for any help as I have been reading about 18650's but nothing I have found addresses my question.