Battery Capacity needed.

[Freddmc]

I build tack boxes for storage of saddles and other horse related items. Th boxes are approx. 5'X3'X 5' high and would function like a small clothes closet where the light would be use intermittantly throughout the day.
I want to run an led light as well as a charger for a cell phone.
I was thinking of a lifep04 battery of approx 10AH.
Can anyone take a wild-ass guess as to how long I could go between charges.

 

[MisterSandals]

10AH x 12v = 120wh.

An iphone X needs 2716mAh (at 5v i presume)= 13.6wh (8.8 full charges)

Lets say you have a 3 watt LED, lets be wasteful and use an hour: 3wh (40 hours)

I would think just less than a week but it really depends on your phone usage more than the LED light.

 

[Freddmc]

Thanks.That gives me a good starting point.
Regards
fred