This high capacity Lithium Ion battery is use with the Iridium 9500 or 9505 satellite phone.

Talk time and standby time may vary with model.
Specifications:
Talk Time: Up to 3.8 hrs
Standby Time: Up to 34 hrs
Weight: 98 grams (3.4 ounces)

Please note that this battery will not work in the Iridium 9505a phone.

If your battery charger plugs into the side of the phone you have an Iridium 9505a, and should order the 9505a battery.  If it plugs into the bottom you have a 9500 or 9505 and should order this battery