Novatel Wireless MiFi2200 Compatible Battery 3.7V 1050mAh

Novatel Wireless MiFi2200 — 3.7V Li-ion Replacement Battery (40115114.00)

This 3.7V 1050mAh Li-ion battery is a direct replacement for the Novatel Wireless MiFi2200 mobile hotspot. It fits the MiFi2200 portable Wi-Fi unit that shares a cellular data connection across multiple devices. Voltage and capacity match the original spec exactly.

• MiFi2200 fit: The MiFi2200 runs a single-cell 3.7V Li-ion pack with OEM part references 40115114.00, 3-1826107-9, and L01478001. All three numbers trace back to the same cell configuration and connector footprint used in this hotspot generation.
• Bench tested on actual hardware: We cycled this battery through combined modem and Wi-Fi load conditions. The BMS held stable cutoff at the low-voltage threshold without false trips, and the pack charged cleanly to 4.2V termination under the MiFi2200's onboard charge circuit.
• Cellular radio heat management: Keep the MiFi2200 on an open surface during extended sessions. When connected devices are far from the hotspot, the cellular radio runs at maximum output power — the extra heat generated directly at the battery accelerates cell degradation over time.

Why the MiFi2200 drops all connected clients mid-session

The MiFi2200 runs two power-hungry subsystems simultaneously — the cellular modem and the Wi-Fi radio. At maximum client connections, combined current draw can pull the battery voltage down sharply. If the pack is aged or partially charged, this sag can breach the BMS low-voltage cutoff, causing an abrupt shutdown that drops all clients. A fresh cell with stable internal resistance maintains voltage above the cutoff threshold even under peak load.

MiFi2200 not powering on after sitting unused

Li-ion cells self-discharge during storage. If the MiFi2200 sat unused for several months, the battery may have dropped below the minimum boot voltage — typically around 3.0V for this cell chemistry. The device needs enough voltage to initialise its firmware before the charge circuit can top it up, so it appears completely dead rather than just low. Connect the hotspot to a charger and leave it for 20–30 minutes before attempting to power it on; most units resume normal boot once the cell recovers above 3.2V.