Tenda 4G180 Compatible Battery 3.8V 2100mAh AHB495060

Tenda 4G180 / 4G185 Series — 3.8V Li-ion Replacement Battery (AHB495060)

This is a 3.8V, 2100mAh Li-ion battery for the Tenda 4G180 and 4G185 portable LTE hotspot range. It replaces OEM part AHB495060, fitting directly into the battery compartment of these compact mobile hotspot devices. If your hotspot is shutting down unexpectedly or no longer holding a charge, this replaces the cell that powers the modem and Wi-Fi radio simultaneously.

• 4G180, 4G185, and MF3 compatibility: These models share the same 3.8V cell platform, AHB495060 connector layout, and BMS communication protocol — one cell fits the full group without modification.
• Bench tested on actual hardware: We ran this cell under combined modem and Wi-Fi load, cycling the BMS through charge and discharge at rated current. The protection circuit held within spec at both ends of the voltage window.
• Cellular radio heat management: Keep the hotspot on an open, flat surface during extended sessions. When connected devices are spread out or signal is weak, the modem boosts transmit power — that sustained radio output generates heat that cycles back into the cell and accelerates capacity fade over time.

Why the 4G180 drops connected devices mid-session under full load

The 4G180 runs two power-hungry systems off the same cell — the LTE modem and the Wi-Fi radio. At maximum connected devices, both draw simultaneously, spiking current demand beyond what a degraded or cold cell can sustain. The BMS reads the resulting voltage sag as a low-battery condition and cuts output to protect the cell. A fresh cell at full charge holds the rail steady; a worn one collapses under the same load and triggers a session drop.

Hotspot won't power on after sitting unused for weeks

Li-ion cells self-discharge at roughly 1–3% per month at rest. If the 4G180 sat stored with a low charge, the cell may have dropped below the BMS minimum boot threshold — typically around 3.0V per cell. At that point, the BMS locks out discharge to prevent damage, and the device shows no response to the power button. Connect the hotspot to a charger and leave it for 15–20 minutes; the charger's trickle stage can recover cells sitting just below the cutoff. If the device still won't respond after 30 minutes on charge, the cell is below recoverable voltage and needs replacement.