Navigon Triansonic PNA 7000 Compatible Battery 3.7V 1230mAh

Navigon Triansonic PNA 7000 Series — 3.7V Li-Polymer Replacement Battery (E4MT081202B22)

This 3.7V, 1230mAh Li-Polymer cell replaces the factory battery in the Navigon Triansonic PNA 7000, PNA 7000T, PNA 7100, and PNA 7310 portable GPS navigators. It fits the same footprint as the original at 50.20 × 36.41 × 6.23mm and uses OEM part number E4MT081202B22. If your unit powers off unexpectedly or no longer holds a charge, this is the direct swap.

• PNA 7000 series compatibility: The PNA 7000, 7000T, 7100, and 7310 share the same battery bay dimensions, connector pinout, and 3.7V supply rail — one cell covers all four units without modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the PNA platform. The BMS held the cutoff voltage correctly and the protection circuit tripped as expected under an overload condition, then reset cleanly on reconnect.
• Cold-start satellite acquisition after swap: After fitting this cell, power the unit on outdoors and let it acquire a full satellite fix before driving. A complete power removal forces a cold start — first fix typically takes 5–10 minutes compared to under a minute on a warm start. This is normal GPS behaviour, not a fault with the battery.

GPS accuracy dropping at low battery on the PNA 7000

Some portable GPS units reduce RF receiver sensitivity as the battery voltage drops to limit current draw and extend operation. On the PNA 7000, this can show up as position drift or slower map updates before the unit shuts off. The GPS chipset is still running, but it is working with a weaker signal sample. Keeping the battery charged above the mid-point prevents the receiver from entering this reduced-sensitivity state.

Unit shuts off without warning — no low-battery indicator

After a battery swap, the PNA 7000's fuel gauge is uncalibrated against the new cell's actual capacity curve. The unit reads the voltage but has no history on how fast this specific cell drops, so the low-battery warning can trigger late — or not at all — before the protection circuit hits the cutoff threshold and kills power. Run two or three full charge-to-shutdown cycles to let the device recalibrate its voltage-to-charge estimate. After that, the warning icon will reappear at a more accurate state of charge.