Tigermedia Tigerbox Touch Replacement Battery 3.7V 3900mAh

Tigermedia Tigerbox Touch — 3.7V Li-Polymer Replacement Battery (785273P)

This is a 3.7V, 3900mAh lithium-polymer battery for the Tigermedia Tigerbox Touch, Tigerbox Touch Radio Play Box, and model 1233. It slots in where the original cell has degraded and no longer holds a charge through a full listening session.

• Tigerbox Touch and Radio Play Box compatibility: These models share the same battery bay, connector pinout, and BMS handshake protocol. The 785273P part number covers all three variants — the voltage rail and physical footprint (74 × 52 × 9mm) are identical across the range.
• Bench tested on actual hardware: We cycled this cell through the Tigerbox Touch's charge controller and confirmed the BMS accepted the pack without a fault flag. Charge acceptance was normal, cell temperature stayed within the controller's threshold, and the fuel gauge registered correctly at both ends of the cycle.
• Fuel gauge calibration tip: The Tigerbox Touch fuel gauge drifts if the pack never fully discharges. Let the device play until it powers itself off — do this once a month — then charge to 100% without interruption. This recalibrates the gauge and keeps the charge indicator accurate.

Tigerbox Touch showing full charge but audio cuts out after an hour

This happens when the fuel gauge has drifted after months of shallow cycling — the device reports 100% but the cell's actual capacity is a fraction of that. The Tigerbox Touch's BMS will hard-cut the output once cell voltage sags below its minimum threshold, even if the indicator still shows bars. A full discharge-to-shutdown followed by an uninterrupted charge to 100% is the first step. If the cutout persists after two of those cycles, the original cell has degraded past recovery and replacement is the fix.

Audio distorting before the battery indicator reaches empty

The Tigerbox Touch's amplifier draws a sharp current spike at higher volume levels. As the cell ages and internal resistance rises, that spike causes a momentary voltage sag — the amplifier clips because it can't draw enough current cleanly, and you hear distortion before the battery indicator shows low. A fresh cell with lower internal resistance eliminates the sag. After fitting this replacement, confirm the issue is resolved by playing at full volume when the battery reads between 30–40%; if distortion is gone at that point, the old cell's resistance was the cause.