About this replacement
Garmin inReach Mini — 3.7V Li-ion Replacement Battery (361-00114-00)
This 3.7V, 950mAh Li-ion cell replaces the original battery in the Garmin inReach Mini and inReach Mini 2 satellite communicators. It fits models 010-01879-00 and 010-02602-01 — the compact two-way satellite messaging and GPS tracking units. Dimensions are 39.20 × 29.42 × 9.10mm, matching the original cell footprint.
- inReach Mini and Mini 2 fitment: Both generations share the same battery bay dimensions, connector pinout, and BMS handshake. One cell covers both devices without modification.
- Bench tested on actual hardware: We cycled this cell through full charge and discharge on the inReach Mini platform. The BMS responded correctly to charge termination and low-voltage cutoff at the expected thresholds.
- Cold-start satellite acquisition after swap: After fitting this cell, power the device on outdoors and let it acquire a satellite fix before heading into the field. A full power interruption clears the ephemeris cache, so the first fix after a battery swap can take 5–10 minutes. Subsequent locks come in under a minute once the cache rebuilds.
Why the inReach Mini shuts off without warning at low battery
A fresh replacement cell and an aged original cell do not share the same discharge curve. The battery indicator is calibrated against the original cell's curve, so a new cell can read higher than its true remaining capacity — then drop the final percentage points quickly. The device hits its low-voltage cutoff threshold before the on-screen warning has time to register visually. This is not a fault in the replacement cell. After two or three full charge cycles, the indicator recalibrates and the warning reappears at the correct point. Watch for the indicator dropping past 20% as your trigger to find shelter or activate a tracking send.
inReach Mini draining faster during active satellite navigation than in standby
The inReach Mini draws from two separate power loads simultaneously during active navigation: the GPS receiver and the display backlight. In standby or tracking-only mode, the display dims and the GPS polls at longer intervals. Switch the display to the lowest usable brightness setting and increase the track log interval in the device settings to reduce continuous GPS polling. At the device's full navigation load, the 950mAh cell works harder than in standby — that gap in drain rate is normal and not a sign of a faulty battery.