i was at an auction tonight and bought a box lot because i seen a streamlight stinger at the bottom of the box. it is blue and well used, lots of scratches. serial3 1613426 after i got the box home i found the charger too!:thumbsup: buuuttt when i hooked it up to charge i notice that the charger status light was staying lit all the way. took the battery out and took the charger apart and then noticed that if i would unscrew the battery slightly the charger would charge. now i just checked and the light did charge and lights up actually. the lens is cracked in the center from high heat i suppose. what do you adise me to do. i need a new lens. but is the problem in the switch or battery or both. i took a screwdriver and scraped the end of the battery to ensure a good conection, but still iffy on the charge until i unscrewed the battery cap a half turn. what are my bulb options? are there better/brighter leds available? i love my 4d mag with 5c batts and the terralux bulb. where is the best place to buy a lens, brighter bulb?, and do i need a battery or a switch? or both. is this light worth the parts that i would invest into it?