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Apple iPhone 11 Compatible Battery 3500mAh 616-00641

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From $38.99 USD $47.99
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Replaces Apple part 616-00641 for iPhone 11, A2111, A2221 models.
3.83V, 3500mAh lithium-polymer cell restores full charge capacity after battery degradation or capacity loss.
Adhesive pull-tab secures the cell; connector seats flush into the logic board socket without forcing.
We cycled the pack through ten discharge-charge cycles on an iPhone 11 — BMS accepted the new cell and fuel gauge IC tracked voltage linearly across the discharge curve.
On first charge after installation, disable fast charging for one full discharge-charge cycle to let the coulomb counter recalibrate against this cell's discharge profile before USB-PD current flows.
Delivery time

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

Discount: As a thank you for your patience, enjoy 5% off on your order
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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

3.83V

Amp

3500mAh

Apple iPhone 11 — 3.83V Li-Polymer Replacement Battery (616-00641)

This 3.83V, 3500mAh lithium-polymer battery is a direct cell replacement for the Apple iPhone 11, covering model variants A2111 and A2221. It restores power to the display, processor, cellular radio, and all running applications. Fit the original battery when capacity has dropped or the cell no longer holds a charge through a normal day.

  • A2111 and A2221 compatibility: Both variants run the same power architecture — identical voltage rail at 3.83V nominal, same connector, and the same BMS handshake protocol with the iPhone 11 charge IC. One cell fits both without modification.
  • Bench tested on actual hardware: We cycled this cell on an iPhone 11 board and confirmed the BMS completed a full charge handshake, the charge IC accepted current without fault codes, and the fuel gauge IC tracked state-of-charge across a complete discharge curve.
  • Fuel gauge recalibration after install: On first use after fitting, disable fast charging and run one full discharge-to-charge cycle at standard 5W. This lets the coulomb counter recalibrate against the new cell's discharge curve before high-current charging pushes into an uncalibrated fuel gauge.

Sudden shutdown at 20–30% on the replacement cell

A new cell sometimes has a steeper voltage cliff than the aged cell the fuel gauge IC was calibrated against. Under high-current loads — 5G modem, screen at full brightness, background sync — the cell voltage drops faster than the gauge predicts. The iPhone interprets this as a valid low-voltage cutoff and shuts down, even though the percentage shown was 25%. One full discharge-recharge cycle at standard rate allows the coulomb counter to remap its estimate to the new cell's actual curve. After that cycle, shutdowns at 20–30% typically stop.

USB-PD fast charge not triggering on the first cycle after replacement

After a cell swap, the charge IC on some iPhone 11 units defaults to standard 5W on the first charge session while it verifies the new cell's internal resistance and BMS response. This is normal behaviour — it is not a fault with the battery or the charger. Disconnect the cable, power the phone off completely, then reconnect to an 18W USB-PD adapter. Most units accept the fast-charge handshake on the second connection attempt. If it still reverts to 5W, complete one full standard-rate cycle first, then retry the 18W adapter.

Compatible Models

iPhone 11 A2111 A2221

Replaces Part Numbers

616-00641

Technical Specifications

Voltage3.83V
Amp Hours3500mAh
Capacity3500mAh
Rate13.41Wh
Net Weight47g /1.66 oz
Gross Weight97g /3.42 oz
Approximate Weight97g /3.42 oz
Dimension 99.40 x 44.40 x 4.50mm

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 11 shows 20% battery and then just switches off — is this the new cell?

Yes, this is a fuel gauge calibration issue, not a faulty cell. The coulomb counter inside the iPhone was mapped to the old cell's discharge curve, so its percentage estimate is wrong for the new cell. Run one full discharge — use the phone until it shuts off at 0% — then charge uninterrupted to 100% at standard 5W. After that single cycle, the fuel gauge re-anchors its curve and sudden shutdowns at 20–30% stop.

The battery percentage is jumping around erratically after I replaced the cell — what's happening?

The fuel gauge IC is recalibrating to the new cell's impedance and discharge profile. Until it has enough data points from a real discharge cycle, its state-of-charge estimates are unreliable and the percentage can jump 5–10% in either direction. Do not interrupt the first charge — let it run from near-zero to 100% at 5W without unplugging. After one complete cycle the percentage stabilises and erratic jumps stop.

My iPhone 11 won't power on at all after the replacement battery sat in a drawer for a few months — is it dead?

Lithium-polymer cells self-discharge in storage, and if the cell drops below 2.5V the BMS locks out to prevent damage. The phone will not respond to the power button because the BMS is blocking current to the board. Connect a 5W charger and leave it for 20–30 minutes before pressing the power button — the charge IC needs to trickle current into the cell to bring it above the BMS re-enable threshold of approximately 3.0V. If the Apple logo appears within that window, the cell is recovering normally; continue charging to 100% before first use.

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