Garmin GPS Mobile 10 Replacement Battery 3.7V 1100mAh

Garmin GPS Mobile 10 / GLO Series — 3.7V Li-ion Replacement Battery (010-10840-00)

This 3.7V, 1100mAh Li-ion cell replaces the original battery in the Garmin GPS Mobile 10, GPS Mobile 10x, GPS10, and GLO. It matches the OEM voltage and physical footprint, fitting the battery bay without modification. Use the capacity figure from the product data above — 1100mAh — as the reference spec for this listing.

• GPS Mobile 10 / 10x, GPS10, and GLO compatibility: These four units share the same battery bay dimensions, 3.7V voltage rail, and connector pinout. The BMS on each accepts this cell without a handshake reconfiguration — swap in, close the bay, power on.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on GPS Mobile 10 hardware. The BMS accepted the cell immediately, balanced charge terminated cleanly at 4.2V, and low-voltage cutoff triggered correctly before cell damage threshold.
• Cold-start initialisation after swap: After fitting this cell, power the GPS on outdoors before first use and allow it to acquire a satellite fix. A full power removal forces a cold start — first fix can take 5–10 minutes while the unit rebuilds its almanac. Subsequent warm starts drop back under a minute once the almanac is cached.

GPS Mobile 10 shutting off without warning at low battery

The GPS Mobile 10 reads remaining charge from a voltage curve stored in firmware. When the original battery ages, its internal resistance rises and voltage sags faster under GPS receiver load. The firmware's low-battery indicator never triggers because the resting voltage looks fine, but under load it collapses past the cutoff threshold. A fresh cell with lower internal resistance restores the voltage curve the firmware expects, so the on-screen indicator tracks accurately again and gives real warning before shutdown.

GPS accuracy dropping during active navigation on low charge

Some Garmin portable units reduce RF receiver sensitivity at low battery to protect against a hard shutdown during active use. When sensitivity steps down, the unit holds fewer satellite signals and HDOP (horizontal dilution of precision) worsens — position jumps increase on the map. This is not a firmware fault; it is deliberate power management. Keeping the battery charged above the 3.6V threshold prevents the sensitivity reduction from triggering.