Benteng M100 Replacement Battery 3.7V 3000mAh M20H

Benteng M100 — 3.7V Li-ion Replacement Battery (M20H)

This is a 3.7V, 3000mAh Li-ion replacement battery for the Benteng M100 portable Wi-Fi hotspot. It matches the OEM part number M20H and fits directly into the M100 housing. When the original cell degrades and the hotspot shuts down prematurely or won't hold charge, this unit restores normal operation.

• M100 platform fit: The M100 hotspot runs a combined modem and Wi-Fi radio stack from a single cell. This battery matches the voltage rail and physical footprint the BMS expects — incorrect voltage tolerance causes the BMS to reject the pack at startup.
• Bench tested on actual hardware: We cycled this battery under simultaneous cellular and Wi-Fi load. The BMS held cutoff thresholds correctly and did not trip under the combined radio draw at maximum connected devices.
• Ventilation during extended sessions: Keep the M100 on an open surface during long sessions — when client devices are far from the hotspot, the cellular radio pushes to maximum transmit power, generating heat that accelerates cell wear. Avoid placing the unit inside bags or enclosed spaces while active.

Why the M100 drops connected devices mid-session under full load

The M100 manages a cellular modem and a Wi-Fi access point from one 3.7V cell. When all connected device slots are active and the cellular signal is weak, combined current draw spikes sharply. If the battery's internal resistance has risen — common in aged cells — voltage sags below the BMS cutoff threshold, and the unit resets mid-session. A fresh cell with lower internal resistance maintains voltage above that threshold under the same load.

M100 showing full charge indicator but shutting down within minutes of unplugging

This is a classic capacity fade symptom. The cell voltage reads healthy at rest but collapses immediately under load — the BMS interprets this as a full charge because it reads open-circuit voltage, not load voltage. The original battery has lost usable capacity while still appearing charged. Fitting a replacement cell resolves it; after the first full charge cycle, the indicator and actual runtime will align. Charge to 100% before first use on the new unit to let the BMS calibrate its state-of-charge map.