The key is to remember that unlike most batteries, Lithium batteries are not required to be in a specific location (standing up, etc.) I turned one of my lithium batteries on its side and mounted the second one on it’s side on top of the first. Securely strapped the two of them together and no issues at all. Allowed my to get 2 batteries in the same overall footprint for one. The terminals being literally a couple of inches away was an added benefit in setup. Hope this helps