About this replacement
Apple iPod 4th Generation — 3.7V Li-ion Replacement Battery (616-0183)
This 3.7V, 750mAh Li-ion cell replaces the original battery in the Apple iPod 4th Generation, covering models A1059, A1099, and the Photo 30GB M9829, among others. It matches the OEM dimensions at 50.20 × 36.34 × 4.62mm and uses the same connector and BMS communication as the factory cell. If your iPod won't hold a charge or refuses to power on, this is the cell that needs swapping.
- iPod 4th Generation and Photo compatibility: The A1059, A1099, and Photo 30GB M9829 variants all share the same battery bay dimensions, connector pinout, and 3.7V voltage rail. One cell fits the full lineup because Apple didn't change the battery interface across these production runs.
- Bench tested on actual hardware: We ran this cell in an A1059 and monitored BMS handshake, charge acceptance, and cutoff behaviour across three full cycles. The protection circuit tripped correctly at low-voltage threshold and accepted charge current without fault codes from the iPod's charging logic.
- First charge after a cell swap: iPod 4th Generation units coming out of long-term storage frequently enter deep-discharge protection. After installing this cell, connect the charger and leave it for at least 30 minutes before attempting to power on — the device needs a slow trickle to exit protection mode before it will accept normal charge current.
Battery percentage jumping after a cell swap on the iPod 4th Generation
The iPod 4th Generation reads battery level using voltage thresholds, not a fuel gauge IC. When you swap in a fresh cell, the device has no charge history to reference, so the indicator can jump — showing 80%, then dropping to 40% within minutes. This is the voltage-threshold calibration resetting, not a fault with the new cell. Run two or three full charge and discharge cycles and the indicator will stabilise as the firmware maps the new cell's voltage curve.
Playback cutting out before the battery indicator shows empty
The audio amplifier in the iPod 4th Generation draws a brief current spike when buffering or switching tracks. Near the end of a discharge cycle, the cell voltage sags under that spike, hitting the BMS low-voltage cutoff even though the indicator still shows remaining charge. The device shuts down to protect the cell — not because it malfunctioned. Connecting the charger and allowing a full charge to 4.2V before next use resolves the cutoff timing.