A sleeve that will clip on to the 300mah Meteor65 battery sleeve, will allow you to use 450mah.
I printed it on it's end with the clip opening facing upwards at 15mm's without supports.
It's a tight fit to clip it on the 300mah sleeve, but I didn't want it to move around at all.
I'm still testing the right materials, it's pretty brittle with PLA.
The author marked this model as their own original creation. Imported from Thingiverse.