Medion MD95157 GPS Navigator Replacement Battery 3.7V 1700mAh

Medion MD95157 / MD96220 Series — 3.7V Li-ion Replacement Battery (541380530006)

This 3.7V, 1700mAh Li-ion cell replaces the original battery in Medion portable GPS navigators including the MD95157, MD95243, MD95300, and MD96220. It matches the OEM voltage and capacity spec exactly. The physical dimensions are 50 x 35 x 7mm, fitting the original battery bay without modification.

• MD95157 / MD95243 / MD95300 / MD96220 compatibility: These Medion navigators share the same battery bay dimensions, 3.7V supply rail, and connector pinout. All draw from the same BMS handshake protocol, so this cell slots in and communicates with the charge circuit without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a Medion GPS unit and confirmed the BMS accepted the cell, charge termination triggered correctly at 4.2V, and the low-voltage cutoff activated at the expected threshold without false shutdowns.
• Cold-start satellite acquisition after fitting: After a full power interruption from a battery swap, the GPS receiver loses its ephemeris cache and performs a cold start. Power the unit on outdoors before your first drive and allow it to acquire a satellite fix — first lock typically takes 5–10 minutes versus under a minute for a warm start once the almanac is rebuilt.

GPS navigator losing saved routes after battery swap

Some Medion GPS units store active routes and recent destinations in battery-backed volatile RAM. When the original battery is fully removed — rather than just discharged — that RAM loses power entirely and clears. Saved POIs stored in flash memory are unaffected, but unsaved active routes and recent destination history may be gone after a swap. Before removing the old battery, note any active route waypoints so you can re-enter them after fitting the new cell.

Device shuts off without warning at low charge

The on-screen battery indicator on these Medion units is calibrated against the original cell's discharge curve. A replacement cell with a fresh capacity profile can read as 20–30% charge remaining on the indicator while the actual cell voltage has already dropped to the BMS cutoff threshold — roughly 3.0V. The BMS then cuts power abruptly rather than the device giving a low-battery warning first. Run two or three full charge-discharge cycles to let the indicator recalibrate against the new cell's curve.