Ryobi 40V 6Ah Vented Shell

Since Ryobi doesn't cool their batteries in any way, my lawnmower cooks them. 
Earlier I made a vented battery shell for my 7.5Ah battery & so far I've gotten around ~30% more battery life out of it as a result; with it being cool to the touch after full discharge. 

The model of my 6Ah batteries: OP406

Some notes on this model:
* The vents are blind channels through the model, designed to reduce debris/things entering the battery shell
* The vents on both sides have the same surface area despite their different looks
* Be CAREFUL if you decide to open up a battery pack of any kind. Do Not Print This if you are unfamiliar with battery pack construction & safety.