An old friend of mine gave me a Streamlight Stinger LED, Stinger Charger 75100 and AC power supply. The battery is no longer usable. What replacement battery stick should I get? I think the battery that was in here may have been NiCd, since it has the black wrapping. I am inclined to replace it with either NiMH or Li-Ion. Which should I go with and why? Also, which battery technology can the Stinger Charger Model 75100 be used for? Also, should I remain with genuine Streamlight branded battery sticks or are their any after-market battery sticks that have high capacity or lower price without sacrificing quality?