I would get the Lightforce striker 170 mate, a much better beam on it than the Lazerlite, although that is a good lamp as well, and has worked well for years.
I think that the Blitz has a bigger bulb in it than the striker ???.... that's why the battery drains quicker, also you need to check what size bulb is in the Striker because when i phoned around for mine and asked what size bulb was in there i had a few different answers.
SINDASOX