Garmin Edge 510 GPS Replacement Battery 3.7V 800mAh

Garmin Edge 510 — 3.7V Li-ion Replacement Battery (361-00050-10)

This is a 3.7V 800mAh Li-ion cell for the Garmin Edge 510 cycling GPS computer. It replaces OEM part numbers 361-00050-10 and 361-00050-03. Fit this battery when the original cell no longer holds charge or causes unexpected shutdowns during rides.

• Edge 510 platform fit: The Edge 510 uses a compact Li-ion cell with a specific connector and physical footprint — 42.30 x 36.30 x 5.50mm. Both OEM part numbers 361-00050-10 and 361-00050-03 map to this same cell configuration, covering units across production runs.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Edge 510 platform. The BMS accepted full charge without fault flags, and the voltage held steady across a standard GPS navigation load.
• Cold-start satellite acquisition after fitting: After fitting this cell, power the Edge 510 on outdoors and let it acquire a satellite fix before your first ride. GPS performs a full cold start after power interruption — first fix typically takes 5–10 minutes. Subsequent warm starts are much faster.

GPS accuracy dropping as battery level falls on the Edge 510

The Edge 510 GPS receiver draws more power when signal conditions are poor — dense tree cover, urban canyons, or heavy cloud. At low battery, the device may reduce receiver sensitivity to protect the remaining charge. This shows up as position drift or a weaker satellite signal count in the status screen. Keeping the cell above 3.5V under load gives the receiver enough headroom to maintain full sensitivity.

Edge 510 shutting off without a low-battery warning

This happens when the battery indicator is no longer calibrated to the cell's actual discharge curve. The on-screen percentage appears healthy, then the device cuts off abruptly — because the voltage-threshold trigger fires before the visual warning catches up. A fresh cell solves this immediately, but you need to recalibrate the gauge: run a full charge to 100%, then ride until the device shuts off naturally. That single cycle resets the threshold mapping to the new cell's curve.