How many fills out of Luxfer S13S 3000psi pony bottle?

[personman]

Hey guys, My dad has a SCUBA pony bottle that I could use to fill up my 68ci 3000psi Crossfire Stub.
The specifications of the pony bottle are:

Part Number Service: S13S
Pressure (PSI): 3000
Capacity (Cubic Feet): 13.2
Outside Diameter (Inches): 4.4
Overall Length (Inches): 12.9
Empty Weight (Pounds): 5.9
Minimum Internal Volume (Cubic Inches): 116
Minimum Water Weight (Pounds): 4.8
Salt Water Buoyancy --Full (Pounds): -1.7
Salt Water Buoyancy --Half (Pounds): -1.2
Salt Water Buoyancy --Empty (Pounds): -0.7

The question is: How many fills could I get out of this?
Based on the size comparison, I would guess 1&1/2..
I want to know if its worth buying one of those fill thingys..

[personman]

PIC of sizes.

[Butterfingers]

Not too many

Its pretty small.

Maybe one fill at 2400 psi and another at 1500 these are just estimates too lazy to do the math.

[personman]

Yeah, Its supposed to be small, its a backup tank. My dad wont buy a big tank cause he says everywhere you can go diving, you can rent one, so why buy one?

[brett]

maybe 1 fill at 2000 psi