Medion GoPal E4240 Replacement Battery 3.7V 1100mAh

Medion GoPal E4240 / E4230 / E4245 — 3.7V Li-ion Replacement Battery (M1100)

This 3.7V, 1100mAh (4.07Wh) lithium-ion cell replaces the M1100 battery in the Medion GoPal E4240, E4230, and E4245 portable GPS navigators. These are compact handheld navigation devices used for vehicle and pedestrian route guidance. Swapping the battery restores a unit that no longer holds charge or fails to power on.

• GoPal E4230, E4240, E4245 compatibility: All three models share the same battery bay dimensions, connector pinout, and 3.7V supply rail. The M1100 part number covers the full range — no adapter or modification needed.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the GoPal platform. The BMS accepted charge from the device's onboard charging circuit without tripping protection cutoffs, and the unit powered up cleanly across multiple cycles.
• Cold-start satellite fix after fitting: After fitting this cell, power the GPS on outdoors and let it acquire a satellite fix before driving. The navigator performs a cold start after any full power interruption — first fix typically takes 5–10 minutes. Subsequent warm starts are under a minute once the almanac is cached.

GPS accuracy reduced at low battery on the GoPal E4240

The GoPal E4240's GPS receiver draws power continuously while navigating. At low battery, the device scales back receiver sensitivity to protect the remaining charge. This shows up as position drift or a signal-strength drop on screen — not a hardware fault. Keeping the battery above 30% charge during active navigation maintains full receiver performance.

GoPal shuts off without warning before the low-battery indicator shows

The on-screen battery gauge on the GoPal series is calibrated against the original cell's discharge curve. An aged or newly swapped cell may have a slightly different discharge profile, causing the device to hit its voltage cutoff threshold — typically around 3.0V — before the indicator reads empty. Run two full charge-to-shutoff cycles after fitting the new cell. This lets the firmware re-map the gauge to the new cell's curve and restores accurate low-battery warnings.