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Apple iPhone 5 Replacement Battery 616-0611 3.8V 1400mAh

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From $30.99 USD $38.99
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Fits Apple iPhone 5 and replaces OEM part number 616-0611.
This 3.8V Li-Polymer cell delivers 1400mAh capacity, matching the original iPhone 5 battery output for full device runtime.
Connector slides into the battery slot with a single pull-tab — no adhesive tabs or locking mechanisms on this generation.
We bench-tested the cell on an iPhone 5 logic board; the fuel gauge IC accepted the new pack without fault codes after seating.
On first use after installation, disable fast charging for one complete discharge-charge cycle — this lets the fuel gauge IC recalibrate against the new cell discharge curve before high-current charging.
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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

3.8V

Amp

1400mAh

Apple iPhone 5 — 3.8V Li-Polymer Replacement Battery (616-0611)

This is a 3.8V, 1400mAh Li-Polymer replacement battery for the Apple iPhone 5. It fits all iPhone 5 variants including MD645LL/A, MD644LL/A, and the 64GB model. It replaces OEM part numbers 616-0611, 616-0613, 616-0610, and 616-0612.

  • iPhone 5 platform fit: All iPhone 5 variants share the same 3.8V battery bay, connector pinout, and BMS handshake protocol. Any unit listed under the MD644 or MD645 series uses this exact cell format without modification.
  • Bench tested on actual hardware: We cycled this cell on an iPhone 5 mainboard and confirmed the BMS initialised correctly on first boot. The fuel gauge IC accepted the new cell and began coulomb counting without triggering a low-voltage lockout.
  • Fuel gauge recalibration after swap: After installation, run one full discharge to auto-shutdown and charge uninterrupted to 100% before resuming normal use. This lets the fuel gauge IC map its calibration curve against the new cell before the OS begins reading state-of-charge data.

Why the iPhone 5 reports wrong battery percentage after a cell swap

The iPhone 5 uses a coulomb counter inside the fuel gauge IC to track charge state. When you replace the cell, that counter still holds calibration data from the old, degraded battery. The IC will map its old discharge curve onto the new cell, which causes percentage readings to drift — often showing full charge then dropping suddenly. One complete discharge-charge cycle resets the calibration window and brings reported percentage back in line with actual cell voltage.

Sudden shutdown at 20–30% on the replacement cell

This happens when the modem or display draws a high instantaneous current and the cell voltage drops sharply below the BMS cutoff threshold — even though the reported percentage looks safe. On the iPhone 5, the combination of LTE radio activity and screen brightness can spike draw enough to cross that cutoff at around 3.5V. The fuel gauge IC hasn't yet learned the new cell's voltage-to-capacity curve, so it doesn't flag the approaching cliff. Run a full calibration cycle first and confirm the shutdown stops occurring before 15% reported charge.

Compatible Models

iPhone 5 MD645LL/A MD644LL/A iPhone 5 64GB MD637LL/A iPhone 5 32GB MD636LL/A MD635LL/A iPhone 5 16GB MD634LL/A MD668LL/A MD667LL/A MD661LL/A MD660LL/A MD657LL/A MD656LL/A MD665LL/A MD664LL/A MD659LL/A MD658LL/A MD655LL/A MD654LL/A ME487LL/A ME486LL/A A1428 A1429

Replaces Part Numbers

616-0611 AAP353292PA 616-0613 616-0610 616-0612 P11GM8-01-S01 LIS1491APPCS

Technical Specifications

Voltage3.8V
Amp Hours1400mAh
Capacity1400mAh
Rate5.32Wh
Net Weight50g /1.76 oz
Gross Weight85g /3.00 oz
Approximate Weight85g /3.00 oz
Dimension 91.60 x 31.55 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 5 turned off by itself at around 25% battery after I put in the new cell — is the battery faulty?

This is a voltage cliff shutdown, not a faulty cell. Under high-current load — LTE radio, screen at full brightness — the new cell's voltage drops sharply enough to trip the BMS cutoff before the percentage gauge catches up. The fuel gauge IC is still calibrated to your old cell's discharge curve. Run one full discharge to auto-shutdown followed by an uninterrupted charge to 100%, and the shutdowns should stop. If they continue past 15% after two full cycles, check that the battery connector is fully seated.

The phone won't turn on at all after the new battery sat in a drawer for a few weeks before I installed it — did I kill it?

Li-Polymer cells self-discharge in storage, and if the cell dropped below approximately 2.5V, the BMS enters a lockout state and blocks normal charging to prevent thermal runaway. Plug the phone into a wall charger — not a computer USB port — and leave it connected for 30–40 minutes without pressing any buttons. The charge IC delivers a low trickle current that slowly recovers the cell voltage back above the BMS re-enable threshold. Once it reaches around 3.0V the phone will show the low-battery boot screen and resume normal charging.

The battery percentage jumps around erratically — it went from 60% to 41% in two minutes without me doing anything heavy.

Erratic percentage jumps are a fuel gauge IC recalibration symptom, not a cell defect. The coulomb counter built into the iPhone 5's power management IC is still working from its old reference data after the cell swap, so its state-of-charge estimates are unreliable until it maps the new cell's actual discharge curve. Complete two full discharge-charge cycles — drain to auto-shutdown, charge to 100% each time — and the IC will stabilise its readings. After two cycles, if jumps of more than 5% in under a minute persist under light load, reseat the battery flex connector and check for contact corrosion.

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