Foil Drive Max battery how to discharge it to iPhone or similar

Hi could be a silly question, but I would like to know if it is possible to discharge the foil drive max to a safe storage level by means of using the battery to charge another device?

Youll need to have a step down voltage converter. Im pretty sure foildrive uses xt60-xt90 connections.

So it should be something like this:
Battery → Voltage Converter (to 12V) → one of those 12v car sockets → plug 12v car usb adapter in and start charging your phone.

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Simple:

https://www.amazon.co.uk/YBBOTT-USB-AF-Inverter-10V-60V-Transformer-Buck-5V3A/dp/B0CZDKDXVQ/ref=asc_df_B0CZDKDXVQ?mcid=cd99291e3bab31d9982169be85c49721&tag=googshopuk-21&linkCode=df0&hvadid=710804269330&hvpos=&hvnetw=g&hvrand=3010931886154744164&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1006886&hvtargid=pla-2304327267281&hvocijid=3010931886154744164-B0CZDKDXVQ-&hvexpln=0&gad_source=1&th=1

Loads of other options. Just google 60v (this will be up to 60V) to 5V charger.