About this replacement
Garmin Edge 500 / Edge 200 Series — 3.7V Li-ion Replacement Battery (361-0043-00)
This 3.7V, 600mAh Li-ion cell replaces the original battery in the Garmin Edge 200, Edge 205, Edge 500, and Edge Explore 820 GPS cycling computers. It fits the same physical footprint at 38.53 × 31.03 × 5.80mm and uses the same OEM part numbers 361-0043-00 and 361-0043-01. Swap it when the original cell no longer holds charge through a full ride.
- Edge 200 / 205 / 500 / Explore 820 compatibility: These models share the same battery cavity dimensions, connector pinout, and 3.7V supply rail. The BMS on each device reads cell voltage directly — no proprietary handshake or authentication chip blocks a replacement cell.
- Bench tested on actual hardware: We cycled this cell on the Edge 500 platform through charge and discharge passes. The onboard BMS accepted the cell without error flags, and voltage under GPS-active load stayed above the 3.4V cutoff threshold throughout each pass.
- Cold-start procedure after fitting: Power the device on outdoors immediately after fitting this cell. The Edge performs a cold GPS start after any full power interruption — first satellite acquisition takes 5–10 minutes. Subsequent warm starts drop to under a minute once the almanac is cached.
Why the Edge 200 shuts off without warning at low battery
The Edge 200 estimates remaining charge using the cell's voltage curve. After years of use, a degraded original cell develops a flattened discharge curve — voltage holds steady then drops sharply, giving the device almost no time to trigger the low-battery icon before the BMS cutoff fires. A fresh cell restores a normal voltage curve, so the low-battery warning appears again with enough lead time to save your ride data before shutdown.
Saved routes and ride history missing after battery swap
The Edge 200 stores user data in non-volatile flash memory, not in battery-backed RAM, so ride history and saved courses survive a full power removal. If data appears missing after the swap, the device may have loaded the wrong unit profile due to an incomplete first boot. Do a full power cycle — hold the power button until the screen clears, then restart. If the issue persists, reconnect to Garmin Express to restore backed-up routes from the last sync.