I've got a 1st generation M3 that I bought new in 00, I've tried putting a cellextender on it so i can run 17670's rechargeables. No luck apparently the older M3's are different than newer models, I put on the cell extender and the batts slide back and forth and will not make conact, hence it won't light up. Can anyone offer suggestions on how to make this work?:thinking: