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Samsung Galaxy A71 EB-BA715ABY Replacement Battery 3.85V 4100mAh

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From $26.99 USD $33.99
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Fits Samsung Galaxy A71 (SM-A715F, SM-A716U, SM-A7160) and replaces OEM part EB-BA715ABY.
Voltage 3.85V, capacity 4100mAh — sustains phone load through calls, messaging, and apps.
Connector is flat flex with gold pads; slides into battery slot with notch alignment.
We cycled this cell on A71 hardware; BMS accepted charge without errors or cutoff faults.
On first use after installation, disable fast charging for one complete discharge-charge cycle — this recalibrates the fuel gauge IC against the new cell's 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

3.85V

Amp

4100mAh

Samsung Galaxy A71 / SM-A715F — 3.85V Li-Polymer Replacement Battery (EB-BA715ABY)

This is a 3.85V, 4100mAh (15.79Wh) Li-Polymer cell for the Samsung Galaxy A71 smartphone, covering SM-A715F, SM-A716U, and SM-A7160 variants. It replaces OEM part EB-BA715ABY and GH82-22153A. If your original cell has swollen, drops charge rapidly, or fails to hold voltage under screen or modem load, this cell addresses the root cause directly.

  • A71 series cell compatibility: The SM-A715F, SM-A716U, and SM-A7160 all share the same battery bay geometry, connector pinout, and BMS handshake protocol. One cell format covers the full A71 platform without modification.
  • Bench tested on actual hardware: We ran this cell in an SM-A715F chassis and confirmed the BMS completed a full charge cycle without triggering an overcurrent fault. The fuel gauge IC accepted the cell's discharge curve within one full cycle.
  • First-cycle fuel gauge recalibration: On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve accurately before high-current charging adds load to an uncalibrated cell.

Sudden shutdown at 20–30% on the Galaxy A71 after a cell swap

This is a voltage cliff issue, not a capacity problem. The Galaxy A71's modem and AMOLED display draw peak current together during active use, and if the fuel gauge IC is still calibrated to the old cell's discharge curve, it misreads the new cell's state of charge. The phone's power management IC hits a voltage floor earlier than the reported percentage suggests and cuts the supply rail. One full discharge-charge cycle at standard rate resets the coulomb counter against the new cell's actual curve. After that cycle, shutdowns at 20–30% typically stop.

USB fast charge not activating on the first cycle after replacement

After a cell swap, the A71's charge IC may default to trickle or standard charge rate on the first cycle — this is a BMS safety behaviour, not a fault with the charger or cable. The new cell's impedance profile is unknown to the charge IC until it completes one full cycle. Connect the phone to the original Samsung fast charger, let it complete a full charge to 100% and discharge to below 10%, then recharge. Fast charge protocol typically activates normally from the second cycle onward.

Compatible Models

Galaxy A71 SM-A715F SM-A716U SM-A7160 SM-A716B SM-A716G

Replaces Part Numbers

EB-BA715ABY GH82-22153A

Technical Specifications

Voltage3.85V
Amp Hours4100mAh
Capacity4100mAh
Rate15.79Wh
Net Weight56.6g /2.00 oz
Gross Weight106.6g /3.76 oz
Approximate Weight106.6g /3.76 oz
Dimension 81.84 x 63.40 x 4.80mm

Product Highlights

  • Brand: Samsung
  • 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 Galaxy A71 powered off at 25% and now it won't turn back on — is the new battery dead?

It is not dead. The phone shut down because the fuel gauge IC was still calibrated to the old cell's discharge curve and cut the power rail before the new cell was actually empty. Hold the power button for 10–15 seconds to force a restart — the phone should boot and show a higher percentage than it reported before shutdown. Run one full discharge-charge cycle at standard rate and the coulomb counter will recalibrate against the new cell. After that cycle, shutdowns at 25–30% stop.

The Galaxy A71 gets warm near the battery during the first charge with the replacement cell — is that normal?

Yes, and it is specific to the first charge. A new Li-Polymer cell has higher internal impedance than a broken-in cell, so the charge IC dissipates slightly more energy as heat while it determines the correct charge current for the new cell. The warmth should reduce noticeably after the first full cycle as the cell's impedance settles. If the phone stays hot past the second full charge, check that the back cover is fully seated — any gap reduces heat transfer away from the cell.

The battery percentage on my A71 keeps jumping — it reads 60%, then drops to 45%, then climbs back up without charging.

This is the fuel gauge IC recalibrating its coulomb counter against an unfamiliar discharge curve. The Galaxy A71's fuel gauge was mapped to the original cell, and a new cell with a different internal resistance profile causes the IC to revise its state-of-charge estimate mid-use. Let the phone discharge fully until it shuts off on its own, then charge uninterrupted to 100% without using the phone. That single full cycle gives the fuel gauge enough data to lock in an accurate curve, and the percentage jumping stops.

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