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Apple iPhone 6 Replacement Battery 3.82V 2160mAh 616-0805

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From $26.99 USD $33.99
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Fits Apple iPhone 6 models A1586, A1589, A1549 and replaces OEM part 616-0805.
3.82V, 2160mAh lithium-polymer cell restores full charge cycles on aged iPhone 6 units.
Connector seats flush into the internal dock with no orientation tabs or locking mechanisms required.
Bench testing showed clean BMS handshake on first insertion; fuel gauge IC required one full discharge-charge cycle to recalibrate.
On first use after installation, disable fast charging for one complete discharge-charge cycle to let the coulomb counter recalibrate against the new cell curve.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

3.82V

Amp

2160mAh

Apple iPhone 6 / A1586 / A1549 — 3.82V Li-Polymer Replacement Battery (616-0805)

This 3.82V, 2160mAh Li-Polymer battery replaces the original cell in the Apple iPhone 6, covering model numbers A1586, A1589, and A1549. It matches the OEM part numbers 616-0804, 616-0805, 616-0806, and 616-0809. At 96.90 × 39.00 × 3.50mm, it fits the original battery bay without modification.

  • iPhone 6 model coverage: The A1586, A1549, and A1589 variants share the same battery bay dimensions, connector pinout, and BMS handshake protocol — one cell covers all three without adapter or wiring change.
  • Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on an iPhone 6 A1586. The BMS communicated correctly with the charge IC, held voltage through screen-on and modem-active load, and passed Apple's battery health check in Settings.
  • Fuel gauge recalibration on first use: After installation, disable fast charging for the first complete discharge-charge cycle. The fuel gauge IC calibrates its coulomb counter against the new cell's discharge curve — skipping this can leave the IC reading the old curve and reporting inaccurate percentages for several days.

Sudden shutdown at 20–30% on the iPhone 6 after a cell swap

The iPhone 6's fuel gauge IC stores a charge curve from the previous cell in non-volatile memory. When a new cell goes in, the stored curve no longer matches the actual discharge profile of the replacement. Under high-current loads — active LTE, screen at full brightness, GPS — the cell voltage dips faster than the IC expects, triggering a protection cutoff before the displayed percentage reaches zero. One full discharge-charge cycle forces the coulomb counter to rebuild its curve against the new cell. After that cycle, the 20–30% shutdowns stop.

iPhone 6 not powering on after the battery sat discharged in storage

Li-Polymer cells enter BMS lockout when voltage drops below approximately 2.5V per cell — a state triggered by extended storage in a discharged condition. In lockout, the phone shows nothing on screen and does not respond to the power button. Connect the phone to a wall adapter rated at 5V/1A and leave it for 20–30 minutes without pressing any button — the charge IC trickle-charges the cell back above the BMS re-enable threshold. Once the Apple logo appears, the BMS has released lockout and normal charging resumes.

Compatible Models

iPhone 6 A1586 A1589 A1549

Replaces Part Numbers

616-0805 616-0806 616-0804 616-0809

Technical Specifications

Voltage3.82V
Amp Hours2160mAh
Capacity2160mAh
Rate8.25Wh
Net Weight31g /1.09 oz
Gross Weight66g /2.33 oz
Approximate Weight66g /2.33 oz
Dimension 96.90 x 39.00 x 3.50mm

Product Highlights

  • Brand: Apple
  • Manufacturer: CS
  • Series: X-Longer
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My iPhone 6 shows 25% battery and then shuts off without warning — is the new cell faulty?

The cell is almost certainly fine. The fuel gauge IC on the iPhone 6 calibrated its discharge curve to your old, degraded cell and hasn't updated it yet. Under modem or screen load, voltage sags faster than the IC predicts, and it triggers a shutdown at the wrong percentage. Run one complete discharge to shutdown, then charge uninterrupted to 100% — the coulomb counter recalibrates against the new cell's curve and the early shutdowns stop.

The battery percentage on my iPhone 6 jumps around after the replacement — it skips from 60% to 45% in minutes.

Erratic percentage readings after a cell swap come from the fuel gauge IC replaying a stored curve that no longer matches the new cell. The IC uses impedance tracking and coulomb counting, and both references are stale after a cell change. The fix is the same: one uninterrupted full discharge followed by a full charge to 100% with the screen off. After that cycle the IC locks onto the new cell's actual impedance profile and the jumps settle.

My iPhone 6 won't turn on at all after I installed the replacement battery — the screen stays black.

This is BMS lockout. It happens when the replacement cell's voltage dropped below 2.5V during shipping or storage. The protection circuit blocks output until the cell recovers. Plug the phone into a 5V/1A wall adapter — not a computer USB port — and leave it undisturbed for 20 to 30 minutes without pressing the power button. The charge IC delivers a trickle current that brings the cell back above the BMS re-enable threshold; the Apple logo will appear once lockout clears.

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