About this replacement
Thuraya SO-2510 / SO-2520 / SO-3319 — 3.7V Li-ion Replacement Battery (AM000717)
This 3.7V, 1100mAh Li-ion battery replaces the OEM pack in the Thuraya SO-2510, SO-2520, SO-3319, and TG-2520 satellite phones. It fits the standard battery bay on all four models and uses the same connector and BMS handshake as the original AM000717 and AM010084 packs. Capacity is 4.07Wh — identical to factory spec.
- SO-2510 / SO-2520 / SO-3319 / TG-2520 compatibility: All four models share the same 3.7V single-cell architecture, physical footprint (58.60 × 37.10 × 9.00mm), and BMS communication protocol. One battery covers the full group without modification.
- Bench tested on actual hardware: We cycled this pack through satellite acquisition sequences on the SO-2510 — including the antenna deployment current spike and sustained transmit draw. The BMS held voltage without tripping at any stage of the test.
- Cold-field pre-warming: Below 0°C, Li-ion internal resistance rises sharply. The satellite acquisition current spike can trip the BMS on a cold cell before a call even connects. Keep the battery in an inner jacket pocket until the phone is ready to use.
Why the SO-2510 shuts down during satellite acquisition
Satellite acquisition on the SO-2510 combines antenna deployment, initial radio scan, and signal lock — all within a few seconds. That sequence draws more current than steady-state voice transmission. An ageing or cold cell can't sustain the voltage during this spike, so the BMS cuts the output to protect the cell. The phone powers off before a single call goes through. A fresh cell rated to the correct 3.7V nominal handles this surge without the voltage sagging below BMS threshold.
Charger won't accept the pack after extended storage
Li-ion cells left unused for several months can self-discharge below the charger's acceptance voltage — typically around 2.5V on most Thuraya desktop chargers. The charger reads the low cell voltage as a fault and refuses to begin the charge cycle. This isn't a dead battery. Connect the phone itself to USB power rather than the standalone charger — the phone's internal charge circuit often applies a trickle current that brings the cell back up to acceptance voltage. Once the cell reads above 3.0V, the desktop charger will begin a normal charge cycle.