About this replacement
JBL Flip 5 / Link Portable — 3.7V Li-ion Replacement Battery (ID1060-B)
This is a 3.7V, 6800mAh Li-ion replacement battery for the JBL Flip 5 and Link Portable Bluetooth speakers. It replaces OEM part ID1060-B and cross-references 1INR19/66-2, ID1060-A, and 33LIR200120. Fit this battery when the original no longer holds charge and the speaker has lost its portability.
- Flip 5 and Link Portable compatibility: Both speakers share the same 3.7V cell format, connector pinout, and BMS handshake protocol. The fuel gauge IC communicates directly with the battery pack — this cell matches that communication spec so the charge indicator reads accurately from the first cycle.
- Bench tested on actual hardware: We ran this pack through charge and discharge cycles on a Flip 5 unit. The BMS accepted the cell without fault flags, the protection circuit triggered correctly at low-voltage cutoff, and the charge IC reached full termination at the expected threshold without false-positive full readings.
- Discharge cycle for Flip 5 daily users: If the Flip 5 sits on a desk and gets topped off before it drops below 50%, let it run down below 20% at least once a month before recharging. Constant shallow charging causes fuel gauge drift — the speaker reports full charge but the usable capacity quietly shrinks over time.
Voltage sag under combined amplifier and Bluetooth radio draw
The Flip 5 runs its Class D amplifier and Bluetooth radio from the same cell. At high volume, the amplifier pulls a sharp current spike while the radio simultaneously draws for packet transmission. A worn or degraded cell cannot sustain voltage under that combined load — internal resistance climbs, and the cell voltage sags below the amplifier's stable operating range. This replacement cell has lower internal resistance than a worn original, so the voltage rail stays stable under peak draw.
Speaker fails to wake from USB-C charging on a deeply discharged pack
If a Flip 5 has been left fully discharged for weeks, the cell voltage can drop below the USB-C PD minimum acceptance threshold — typically around 2.5V. At that point, the charger sees the port as unresponsive and delivers no current, so the speaker appears completely dead even on a known-good cable. Connect the speaker to a 5V USB-A charger instead of USB-C, leave it for 15–20 minutes to allow trickle pre-charge to bring the cell back above acceptance voltage, then switch to the standard USB-C cable to complete the charge normally.