MrRusty

Genius !

Undoing the colimation screws has indeed freed the 3rd and final battery. 

I'll follow the link to the recollimation instructions and I'm good to go.

Thanks everyone for all your help.

Thanks for all the tips.  I've been using a very strong magnet without success and bluetack doesn't work either.

I'll try and get some probes as sub dwarf suggested, but I'm beginning to think that I'll have to drill it, then attach a screw to pull it out.

I don't think changing batteries should be this hard !

Thanks for the feedback.  The cap unscrews to reveal the batteries.  2 of which have come out with the encouragement of a strong magnet, but there's another (at least 1) which is not coming out.  It'a bit of an awkward design really.

Any final tips on how to remove stuck batteries ?

Hi everyone,

I'm new to the forum so hoping that I'm posting in the right place.

I have a Revelation Collimator which I have used successfully in the past with my newtonian, but the battery in the collimator has run out and I can't for the life of me work out how to replace it.  I've searched all over and can't find any advice or instructions.

One end of the collimator unscrews, but only reveals the top of what I presume is the laser unit.  This appears to be fixed in place.  There are 3 screws on the body, presumably for collimating it.  I don't want to undo these unecessarily, but cannot see any alternative. 

Any advice gratefully received.

thanks in advance

MrRusty