Have spent some time upgrading and modifying my Inspire, which now works well with the cameras I have for it. the downside is that flight times are not long even using TB48 batteries. I came across this modification on an American website Air America Aerial Imagery which lists a mod using a large capacity LiPo sideways through the battery compartment giving it an extended flying time, Has anyone any comments please? Mike.
It might not increase your flight time but it’ll certainly increase the life of your drone when the DJI batteries are no longer available.
I’ve got a similar mod on my OG Mavic:
I’ve just seen their price, it’s horrific 
$250 + import duty ?! 
You’d be better off spending that £250 quid on TB47 and 48’s from eBay 