Satmap Active 10 Replacement Battery 3.7V 2700mAh

Satmap Active 10 / Active 12 — 3.7V Li-Polymer Replacement Battery (1S2PE583759-02X)

This is a 3.7V 2700mAh Li-Polymer cell for the Satmap Active 10 and Active 12 handheld GPS navigators. It replaces OEM parts 1S2PE583759-02X and ACT10-BAT-00146. Fit the battery when the original cell no longer holds charge or the device shuts off unexpectedly during field use.

• Active 10 and Active 12 compatibility: Both units share the same battery bay dimensions, connector pinout, and BMS handshake protocol — one cell covers both platforms without modification.
• Bench tested on actual hardware: We ran this cell through charge cycles on the Active 10, monitoring BMS cutoff behaviour at low-voltage threshold and verifying the protection circuit trips correctly before cell damage occurs.
• Cold-start behaviour after fitting: After installing this cell, power the device on outdoors and let it acquire a satellite fix before relying on it for navigation. GPS units perform a full cold start after any complete power interruption — first fix can take 5–10 minutes; subsequent warm starts drop to under a minute.

Why the Active 10 shuts off without showing a low-battery warning

The Active 10 reads remaining charge from a voltage curve stored against the original cell's discharge profile. When the cell ages, its internal resistance rises and terminal voltage drops faster under GPS-receiver load than the firmware expects. The device hits its hardware cutoff threshold — typically around 3.0V — before the on-screen battery indicator reaches one bar. Fitting a new cell resets this discrepancy; the voltage curve and the indicator align again after a few full charge and discharge cycles.

GPS accuracy drops noticeably when battery is below half charge

Some GPS receivers reduce RF front-end sensitivity when supply voltage sags below a set point — a power-saving measure that also cuts signal margin. On the Active 10, this can appear as position drift or loss of fix in areas with partial sky coverage. The symptom is not a firmware fault or antenna damage. Keeping the cell above 3.6V under load resolves it; charge before long off-grid legs rather than relying on the remaining capacity indicator alone.