My pal of here rapidjenky uses the tracer 170 and it's a decent lamp, good enough for most scenarios, I believe it uses a 75w bulb where as the lightforce equivilant the striker uses a 100w bulb, the lightforce throws a tighter beam I think but both good lamps. Wiring will be a lot better in tracer and the variable power dial is also better as lightforce now use 2 buttons which is crap, I have just sent my new one back. As for battery's you won't need any other battery if you go with the 22ah lithium it's brilliant, I have just got one for next season and the size to weight to power ratio comp