This one
https://ifly.adventurepilot.com/shop-t136/accessories/dc-hardwire-cord.aspx
recommends 1.5 amp fuse inline.
i understand the purpose but have two thoughts:
The regular plug into aircraft 12volt accessory plug most iFlys use is typically rated at about 15 amps ..thus surely not fused at 1.5 amps .
so I'm inclined to infer either that the regular set up is not properly protected OR that the recommendation fkr fuse on the hardware cord is overkill.
and a suggestion. Fining a fuse case and a 1.5 amp fuse at RadioShack and the splicing it into the hardwjre cord is a bit of a nuisense ... Suggest you char $2 more and integrate the fuse into the hardwjre cord.
alex