Autel Evo II Pro Battery Holder

This is the very first thing I have designed so it took me a couple days and about 11 different prints!

I designed this so I can charge the batteries in my vehicle. I have a shelf where I charge various things for work and this helps keep the batteries from falling out of the charger while I am driving. I plan to use velcro to secure it.

Open to any suggestions to make it better. Right now I have just printed in PLA but need to find something that will withstand the summer heat and cold of winter.

Thanks,