Garmin Edge 1000 Replacement Battery 3.7V 1200mAh

Garmin Edge 1000 — 3.7V Li-ion Replacement Battery (361-00035-15)

This 3.7V, 1200mAh lithium-ion cell replaces the original battery in the Garmin Edge 1000 and Edge Explore GPS cycling computers. It matches the OEM dimensions at 52.50 × 34.20 × 5.50mm and drops into the same connector position. Voltage and capacity figures come from the product data, not estimates.

• Edge 1000 and Edge Explore compatibility: Both devices share the same battery bay, connector pinout, and 3.7V supply rail. The BMS handshake on each model accepts this cell without triggering a fault state on power-up.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Edge 1000 platform. The BMS reached full charge without cutoff errors and the device booted normally across repeated power cycles.
• Cold-start behaviour after fitting: After installing this battery, power the Edge 1000 on outdoors before your first ride. A full power interruption clears the warm-start cache, so the GPS receiver performs a cold start — expect satellite acquisition to take up to 10 minutes on first fix rather than the usual under-one-minute warm start.

GPS accuracy dropping as the Edge 1000 battery gets low

Some GPS receivers reduce antenna sensitivity at low battery to protect remaining charge for core functions. On the Edge 1000, this can show up as position drift or slower track updates in the final portion of a ride. The fix is straightforward — a fresh cell keeps the receiver running at full sensitivity for the whole ride. If you notice drift starting earlier than expected, check the battery indicator; the display voltage threshold may need recalibration after the swap, so let the battery run through one full charge-discharge cycle first.

Edge 1000 shuts off without warning before the indicator hits zero

The battery percentage indicator on the Edge 1000 is calibrated against the original cell's discharge curve. A new cell — or a degraded original — can cause the device to cut power before the on-screen indicator reaches the low-battery warning. This happens because the voltage-threshold that triggers shutdown is hit while the display still reads 20–30%. Run one complete charge and discharge cycle after fitting this battery. After that cycle, the indicator recalibrates and shutdown warnings align with the actual remaining charge at approximately 3.5V cutoff.