Samsung Galaxy 5G Mobile WiFi Replacement Battery EB-BA426ABY 3.85V 4900mAh

Samsung Galaxy 5G Mobile WiFi SCR-01 — 3.85V Li-Polymer Replacement Battery (EB-BA426ABY)

This 3.85V, 4900mAh Li-Polymer battery replaces the EB-BA426ABY cell in the Samsung Galaxy 5G Mobile WiFi hotspot (SCR-01 / SCR01). It restores the device's ability to broadcast a mobile internet connection when the original cell has degraded or failed. Capacity figure is sourced from the product specification — 18.87Wh total energy.

• SCR-01 and SCR01 platform fit: Both model codes reference the same hardware revision. The connector pinout, BMS handshake voltage, and cell footprint (80.34 × 62.24 × 5.42mm) are identical across both designations, so one cell covers the full variant range.
• Bench tested on actual hardware: We ran this cell on an SCR-01 unit under simultaneous 5G modem and multi-device WiFi load. The BMS held charge termination at the correct cutoff voltage and showed no false low-battery flags during sustained high-draw cycles.
• Ventilation during hotspot sessions: When connected devices are far from the hotspot, the cellular radio pushes to maximum output power. Place the SCR-01 on an open surface — not a pocket or bag — during extended sessions to prevent heat from compressing the Li-Polymer cell layers.

Voltage sag under combined 5G modem and multi-device WiFi draw

The SCR-01 runs two high-draw subsystems simultaneously — the 5G modem and the WiFi radio. When multiple clients are connected and the modem is working hard in a weak signal area, instantaneous current draw spikes sharply. A degraded original battery cannot sustain voltage under that load, causing the BMS to trip the protection circuit. A fresh 4900mAh cell with a healthy internal resistance handles those current spikes without triggering cutoff.

SCR-01 not powering on after sitting in storage

Li-Polymer cells self-discharge slowly over weeks of inactivity. If the SCR-01 has been stored unused for several months, the battery may have dropped below the minimum boot voltage — typically around 3.0V per cell — and the BMS will block power-on to prevent damage. Connect the device to a Samsung-rated charger and leave it for 20–30 minutes before pressing the power button. If the charge indicator does not respond within that window, the original cell has likely failed and replacement is required.