Heck yes, I'm feeling geeky today.
Just replaced the battery in my Macbook Pro. I don't want to think about what it would have cost to get apple to do it for me!
Actual cost £60 -15% (thanks @m0puh) from eBay and more time spent removing old adhesive than anything else.
It's wet, but let's try this! I'm going to be on 40m for a bit. In the rain. In the car. #hamradio
Trying to remember how this was supposed to be wired up... Hopefully I'll get it working before the @G5BK field weekend.
Its a 18650 power pack with voltage regulation and solar charging capacity.