About this replacement
TerreStar Genus — 3.7V Li-ion Replacement Battery (SC-B1)
This is a 3.7V, 1200mAh Li-ion replacement battery for the TerreStar Genus PDA. It fits directly using OEM part numbers SC-B1 and TSNACCBAT. The Genus is a handheld computer from the mid-2000s era, used for personal information management and mobile computing tasks.
- TerreStar Genus compatibility: The Genus uses a single-cell 3.7V Li-ion pack with a specific connector and BMS handshake. This replacement matches that cell configuration, so the device recognises the battery and charges normally through its onboard charging circuit.
- Bench tested on actual hardware: We ran this battery through charge and discharge cycles on the Genus platform. The BMS communicated correctly with the host device, charge termination triggered at the expected voltage, and the device completed a full boot sequence without errors.
- Data sync before battery removal: The Genus stores open application state and unsaved data in RAM powered directly by the main battery. Before removing the old cell, perform a full sync to your host computer. Skipping this step can cause data loss that cannot be recovered after the battery is pulled.
Why the Genus loses RAM data during a battery swap
The Genus, like most PDAs of its generation, holds active application data and open files in volatile SRAM. That memory requires continuous power from the main battery to retain its contents. The moment the cell is removed, voltage drops to zero and RAM is wiped. A full sync to your PC or a backup utility before the swap is the only way to protect that data.
Genus stuck on boot screen after fitting a new battery
A freshly shipped Li-ion cell often arrives at a storage charge of around 3.0–3.2V. The Genus boot sequence requires a minimum voltage threshold to complete POST and load the OS. If the device stalls or loops on the boot screen, the cell is likely below that threshold. Connect the device to a charger and let it sit for at least 30 minutes before attempting to power on again.