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Samsung Galaxy A5 2017 Replacement Battery EB-BA520ABE 3.85V 3000mAh

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Fits Samsung Galaxy A5 2017 (SM-A520F, SM-A520S, and variants), replaces OEM EB-BA520ABE.
Rated 3.85V at 3000mAh, this lithium-polymer cell delivers 11.55Wh to sustain processor, display, and modem draw.
Connector clips into the original battery slot with standard Samsung contact orientation and mechanical locking tab.
We bench-tested this cell through five full charge-discharge cycles; the BMS accepted charge current normally on cycle one.
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 fast charging pushes current into an uncalibrated cell.
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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

3000mAh

Samsung Galaxy A5 2017 — 3.85V Li-Polymer Replacement Battery (EB-BA520ABE)

This 3.85V, 3000mAh Li-Polymer cell replaces the original battery in the Samsung Galaxy A5 2017, covering SM-A520S, SM-A520F/DS, SM-A520F, and related variants. It matches the OEM part number EB-BA520ABE and fits the stock battery bay without modification. Dimensions are 86.90 × 39.60 × 4.20 mm — confirm these against your existing cell before installing.

  • A5 2017 variant coverage: The SM-A520 series shares one battery footprint and a single voltage rail across all regional variants. The connector pinout and BMS handshake logic are identical across SM-A520S, SM-A520F, and SM-A520F/DS, so one cell covers the full lineup.
  • Bench tested on actual hardware: We ran this cell on an SM-A520F unit. The BMS accepted the charge handshake on the first cycle, charge current ramped correctly through CC/CV stages, and no thermal flags triggered during the full charge sequence.
  • Fuel gauge recalibration on first use: After installation, disable fast charging and run one full discharge-to-charge cycle at standard current. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging begins on an uncalibrated cell.

Why the A5 2017 reports wrong battery percentage after a cell swap

The Galaxy A5 2017 uses a fuel gauge IC that tracks charge state by counting coulombs against a stored discharge curve. That curve was built on the original cell — when you install a new cell, the stored curve no longer matches actual cell behaviour. Until the IC recalibrates, percentage readings can be off by 10–20%. One complete discharge down to auto-shutdown followed by a full charge to 100% at standard current resets the reference curve and restores accurate reporting.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops sharply under load — typically during a modem burst, screen wake, or simultaneous background sync — faster than the fuel gauge IC predicts. The phone's protection circuit reads the voltage cliff as a critical low and cuts power before the displayed percentage reaches zero. It is not a faulty cell; it is an uncalibrated gauge reading a steep-sloped Li-Polymer discharge curve. Run two full discharge-charge cycles at standard current and the shutdowns stop once the IC learns the new cell's actual low-voltage knee, which sits near 3.4V under load.

Compatible Models

Galaxy A5 2017 SM-A520S SM-A520F/DS SM-A520F SM-A520L SM-A520K

Replaces Part Numbers

EB-BA520ABE GH43-04680A

Technical Specifications

Voltage3.85V
Amp Hours3000mAh
Capacity3000mAh
Rate11.55Wh
Net Weight37g /1.31 oz
Gross Weight72g /2.54 oz
Approximate Weight72g /2.54 oz
Dimension 86.90 x 39.60 x 4.20 mm

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

The A5 2017 won't turn on after the new battery sat in a drawer for a few months — is the cell dead?

Probably not dead, but the BMS has gone into lockout. Li-Polymer cells that self-discharge below roughly 2.5V trigger a protection cutoff to prevent damage, and the phone won't boot from that state. Connect the phone to a wall charger — not a PC port — and leave it for 20–30 minutes before attempting power-on. If the charge LED doesn't light at all, the cell voltage is low enough that the BMS needs a slow trickle to recover; most Samsung chargers handle this automatically once current is present.

Fast charging stopped working after I fitted the replacement battery — the phone charges, but slowly.

This is a first-cycle behaviour. The USB-PD and Samsung Adaptive Fast Charge handshake depends on the BMS reporting a ready state; on a new cell the BMS can hold the charge IC at standard current until it completes one baseline cycle. Charge the phone fully at standard speed, let it discharge to auto-shutdown, then charge again — fast charging typically resumes on the second or third cycle once the BMS clears its initialisation flag.

The battery percentage jumps around erratically — goes from 45% up to 52%, then drops to 38% without much use.

Erratic percentage jumps are the coulomb counter losing track of charge state on a cell it hasn't mapped yet. The fuel gauge IC on the SM-A520 stores a learned discharge curve; a new cell with different internal impedance throws off those calculations until the IC re-learns the curve. Run the phone down to automatic shutdown, then charge uninterrupted to 100% — do this twice. After two full cycles the percentage should stabilise and track within 2–3% of actual charge state.

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