DVR Improvement

I got this https://www.amazon.com/gp/product/B01HGAWWDE/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1
and I needed a way to improve it. One problem is that it is difficult to release the SD card due to the design of the enclosure. I am a designer, hobbyist and HAM radio technician and also I have a 3D printer. I have come up with a version of my enclosure with 18000 ma. of 18650 @ 4.2 volt 6000 ma. each this combination gives me about 9 hours of use before it needs charging. Maybe a little of over kill but it's cool.