LIS2213 Sony SRS-HG1 Replacement Battery 7.4V 3000mAh

Sony SRS-HG1 / SRS-HG2 / SRS-HG110 — 7.4V Li-ion Replacement Battery (LIS2213)

This is a 7.4V, 3000mAh Li-ion battery that replaces the OEM LIS2213 cell in the Sony SRS-HG1, SRS-HG2, and SRS-HG110 portable Bluetooth speakers. It restores full charge capacity when the original pack has degraded from regular daily use. Dimensions are 69.20 × 39.30 × 21.20mm — verify against your existing cell before fitting.

• SRS-HG1 / HG2 / HG110 platform fit: All three models share the same battery bay geometry, connector pinout, and BMS handshake protocol. The LIS2213 part number spans the full HG series, so one cell covers all three variants without any wiring modification.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on an SRS-HG1 unit. The BMS accepted the cell cleanly, reported correct charge state to the speaker's indicator LEDs, and applied the full 7.4V rail to the amplifier board without triggering any low-voltage cutoff.
• Monthly deep-discharge cycle for the HG series: These speakers spend most of their life plugged in or topped off from a desk. Let the pack discharge below 20% at least once a month before recharging. Constant top-off charging without a full discharge cycle causes fuel gauge drift and accelerates capacity fade on the LIS2213 cell.

Bluetooth dropping at high volume on the SRS-HG1

At high volume, the amplifier and the Bluetooth radio draw current simultaneously. On a degraded cell, that combined load causes a brief voltage sag across the 7.4V rail. The speaker's BMS interprets that sag as a near-empty pack and throttles power to protect the cell. The result looks like a Bluetooth drop but is actually a BMS-triggered protection event. A fresh LIS2213 cell with lower internal resistance holds the rail steady under the combined amp and radio draw.

Audio distorting before the battery indicator reaches empty

The SRS-HG1 amplifier starts clipping when the supply voltage sags below the threshold it needs to drive full output swing. A worn cell can hit that sag point well before the fuel gauge reads empty, because internal resistance rises as a Li-ion pack ages. The speaker has already lost usable headroom, but the indicator still shows charge remaining. Replacing the cell with a fresh LIS2213 pack restores a stable 7.4V supply and pushes that clipping threshold back to where it belongs — near the actual end of charge.