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Samsung Galaxy Core 2 EB-BG355BBE Replacement Battery 3.8V 2000mAh

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From $24.99 USD $30.99
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Fits Samsung Galaxy Core 2 SM-G355 and replaces OEM battery EB-BG355BBE.
3.8V at 2000mAh delivers enough charge for a full day of mixed use on this phone.
Connector slides straight down into the battery slot with no locking tab — orientation marked on the housing.
We ran a full discharge curve on the fuel gauge IC and confirmed BMS accepted the new cell without lockout errors.
On first use after installation, disable fast charging for one complete discharge-charge cycle so the coulomb counter recalibrates to this cell's discharge curve.
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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

2000mAh

Samsung Galaxy Core 2 — 3.8V Li-ion Replacement Battery (EB-BG355BBE)

This is a 3.8V, 2000mAh Li-ion replacement battery for the Samsung Galaxy Core 2. It fits SM-G355 and SM-G355H variants and slots into the same compartment as the original EB-BG355BBE cell. Capacity figure is 2000mAh as listed in the product specification.

  • SM-G355 and SM-G355H compatibility: Both handset variants share the same battery bay dimensions, connector pinout, and BMS handshake protocol. The EB-BG355BBE part number covers all regional SM-G355 builds, so one cell fits both.
  • Bench tested on actual hardware: We ran this cell through a full charge and discharge cycle on an SM-G355H. The BMS accepted the charge IC handshake without fault flags, and cell voltage held above 3.6V across a standard draw load.
  • First-cycle fast charge precaution: On first use after installation, disable fast charging for one complete discharge-charge cycle. This allows the fuel gauge IC to recalibrate its discharge curve against the new cell before high-current charging pushes amperage into an uncalibrated coulomb counter.

Sudden shutdown at 20–30% on the Galaxy Core 2 after a cell swap

The SM-G355 uses a coulomb-counter fuel gauge IC that builds its discharge model from previous cell behaviour. After a cell swap, the IC still references the old cell's voltage-to-capacity curve. When the modem transmits or the screen brightness peaks, current draw spikes and the new cell's voltage briefly dips below the IC's cutoff threshold — even though actual charge remains. The phone interprets the voltage dip as empty and shuts down. One full discharge-to-3.4V then full charge cycle forces the IC to rewrite its reference curve to match the new cell.

OS reporting wrong battery percentage after installing the EB-BG355BBE

Percentage jumping or sticking at an incorrect value is a fuel gauge calibration issue, not a faulty cell. The Android battery stats file on the SM-G355 stores the old cell's discharge profile in the device partition. Clear the battery stats cache by fully draining the phone until it powers off, then charge uninterrupted to 100% with the device off. After two cycles of this, the reported percentage should track actual cell voltage within a normal margin.

Compatible Models

SM-G355 SM-G355H Galaxy Core 2 Galaxy Core Lite

Replaces Part Numbers

EB-BG355BBE

Technical Specifications

Voltage3.8V
Amp Hours2000mAh
Capacity2000mAh
Rate7.6Wh
Net Weight35g /1.23 oz
Gross Weight60g /2.12 oz
Approximate Weight60g /2.12 oz
Dimension 56.40 x 50.50 x 5.60mm

Product Highlights

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

Frequently Asked Questions

My Galaxy Core 2 won't turn on at all after the new battery sat in the drawer for a few months — is the cell dead?

It is almost certainly a BMS lockout, not a dead cell. When cell voltage drops below roughly 2.5V during storage, the battery management system locks the output rail to prevent damage. Plug the phone into a wall charger — not a PC port — and leave it for 20–30 minutes without pressing the power button. The charge IC needs to trickle enough current into the cell to lift it above the BMS re-enable threshold before the phone will respond.

Fast charging stopped working the first time I charged the replacement EB-BG355BBE — is the charger the problem?

The charger is likely fine. On a first cycle, the BMS on a new cell can reject the handshake from Samsung's Adaptive Fast Charging protocol because the cell's internal impedance profile is unfamiliar to the charge IC. Charge once at standard 5V/1A to completion, let the phone run down normally, then charge again — by the second cycle the charge IC negotiates the higher current tier correctly. If fast charging still does not activate after two full cycles, confirm the charger output with a USB meter and check the charging port pins for debris.

The battery percentage on my SM-G355 jumps erratically — it reads 45% then suddenly drops to 12% a few minutes later.

This is the fuel gauge IC recalibrating after the cell swap, not a defective battery. The IC's stored discharge curve no longer matches the new cell's actual voltage behaviour, so percentage readings become unstable. Drain the phone completely until it shuts itself off, then charge to 100% in one uninterrupted session with the screen off. Repeat this cycle once more and the coulomb counter will have enough data to report percentage accurately against the new cell's voltage curve.

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