First up, Battery change for my Gen2 Exposure Joystick. Purchased in 2008, it's seen a fair bit of use, and now it only lasts about 10 mins on max, so time for a new battery. There's a few services out there that do this for you, and you can buy batteries and do it yourself. I did mine a bit differently to other ones I've seen on the internet, so thought I'd share it here.

Joystick_battery1920 by Chris Reeves, on Flickr
So, unscrewed the top, and pulled out the original 3.7v Li-ion 18650 battery (a lousy 2350mAh), to be replaced with a half decent nitecore 3400mAh battery. important that this has to have the charging/discharging protection circuit built in. Cheaper batteries are available via ebay etc, but I don't think they're worth it. The next step was then using copper washers soldered to some new cable to work as my connector pieces - this saves any future soldering required for changing the battery again in the future. Solder in these new cables with copper washers onto the main circuit board, heat shrink to insulate and then tape new batteries onto the copper washer connectors. I ditched the original bit of foam padding and used some sticky back neoprene I had kicking about. Test the light now to check it works (pre charged battery required, I have a separate li-ion battery charger handily.) Now, shove the battery back in, and replace the o-ring if you can - mine was shagged, and I didn't have any spare the correct size, so used some gasket sealant to make a water-proof ish seal when I screwed the top back on.
And voila, all working properly again, charges and everything. Nice little capacity upgrade too
