I use sanyo atm and have have been satisfied with eagletac and jetbeam as part of my edc.
The LI-ion 3.7 are usually 14500, 16340, 18350, 18500, 18650, 26650. Your 14500 will work
work in your charger as it does both Lithium Ion and Nickel Metal Hydride.
I still use aw protected 14500 that...