ID1060-B JBL Flip 5 Replacement Battery 3.7V 5200mAh

JBL Flip 5 / Link Portable — 3.7V Li-ion Replacement Battery (ID1060-B)

This is a 3.7V Li-ion replacement battery rated at 5200mAh (19.24Wh), cross-referenced to OEM part numbers ID1060-B, ID1060-A, and 1INR19/66-2. It fits the JBL Flip 5 and Link Portable Bluetooth speakers. Swap it when the original cell no longer holds a charge across a full listening session.

• Flip 5 and Link Portable compatibility: Both speakers share the same single-cell 3.7V nominal rail, physical footprint, and JST-style connector pinout. The BMS handshake on each device reads cell voltage and temperature from the same protection circuit layout, so one cell fits both platforms without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a Flip 5 unit, confirmed the BMS accepted the pack without fault flags, and verified the protection circuit tripped correctly at the low-voltage cutoff threshold before the cell reached an unsafe depth of discharge.
• Fuel gauge reset after install: Once fitted, run the Flip 5 down until it auto-shuts off, then charge uninterrupted to 100% before use. The onboard fuel gauge recalibrates to the new cell's actual capacity — skipping this step leaves the indicator misreading from the first cycle.

Capacity fade from constant desk-top top-off charging on the Flip 5

The Flip 5 is frequently left plugged in on a desk between short uses, which means the cell rarely drops below 80% before the next charge cycle. Li-ion cells cycled repeatedly in this upper voltage band accumulate electrolyte stress faster than cells allowed to discharge more fully. Over six to twelve months this compresses usable capacity noticeably. Letting the cell drop below 20% at least once a month before recharging slows that degradation and keeps the fuel gauge accurate.

Audio distorting before the battery indicator reaches empty

At high volume, the Class D amplifier inside the Flip 5 pulls current spikes that momentarily sag cell voltage below what the amp needs for clean output. When a degraded cell has elevated internal resistance, those sags are deeper and longer, causing the amplifier to clip before the battery indicator shows low. This distortion is a voltage problem, not a speaker driver problem. Checking cell voltage under load — which should stay above 3.4V during normal playback — confirms whether the battery is the cause.