ALTHOUGH YOU SEE 9000MAH ON THE BATTERY LABEL, THESE ARE 8000MAH PACKS. I AM ALL OUT OF 9000MAH CELLS.
 
You will never find one of these, not even from DJI. It's a temperature-adjustable, computer-controlled, self-heating, 8000 mAh battery mod for all Inspire 1 drone models.
I've got another 30-minute battery mod like this already, but after receiving a picture from a client with hand warmers taped to his battery to warm it up, I decided to come up with a solution.
 
The heating feature can be turned on and off with a push of a button and the thermostat can be adjusted to the desired heating temperature. There's an LED that turns red to tell you the battery is being heated then it goes off when the set temperature is reached. It warms up quickly and the amount of energy it uses is negligible.
 
Built with a 22.8V HV LiPo 8000mAh + pack that lasts about 28 minutes when hovering with an X3 camera installed and lading at 0%.  Flight time will be reduced if using heavier payloads. The entire set with the DJI "head" weighs just under 1000g.
It's not recommended to discharge lithium batteries fully, so realistically you'll get approximately 24 minutes when landing at 20%, and you should not land with less than 15% left not to risk the BMS being reset to 5700mAh.
 
You get everything you need to get your drone up and flying. Self-heating 8000mAh battery, programmed "head", all brackets, straps, and manual.
 
Check out this YouTube video about it...
 
Because they are custom-made, the lead time is about a week.
 
Please feel free to ask questions.
 
Happy flying!