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Samsung Galaxy Core Max Replacement Battery EB-BG510CBC 3.85V 2000mAh

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From $23.99 USD $29.99
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Fits Samsung Galaxy Core Max (SM-G5109, SM-G510F) and replaces OEM part EB-BG510CBC.
3.85V, 2000mAh lithium-ion cell delivers stable voltage across calls, messaging, and app use.
Connector slides into the standard Samsung phone battery slot with no locking tabs required.
We bench-tested this cell in a Galaxy Core Max; BMS accepted charge without fault codes.
On first use after installation, disable fast charging for one complete discharge-charge cycle to let the fuel gauge IC recalibrate 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

2000mAh

Samsung Galaxy Core Max — 3.85V Li-ion Replacement Battery (EB-BG510CBC)

This is a 3.85V, 2000mAh Li-ion replacement battery for the Samsung Galaxy Core Max, compatible with SM-G5109, SM-G510F, Galaxy Core Max Duos, and related variants. It replaces OEM part EB-BG510CBC directly. Use the product dimensions — 54.90 × 50.60 × 6.00mm — to confirm fitment before installation.

  • Core Max and Duos compatibility: The SM-G5109 and SM-G510F share the same battery bay dimensions, connector pinout, and BMS handshake protocol — both accept the EB-BG510CBC cell without modification.
  • Bench tested on actual hardware: We cycled this battery on the SM-G510F platform and confirmed the BMS negotiated correctly with the charge IC, reaching full cutoff at 4.35V with no false-full triggers.
  • First-cycle fuel gauge recalibration: After fitting this cell, disable fast charging and run one full discharge down to auto-shutdown, then charge uninterrupted to 100%. This gives the fuel gauge IC a clean reference curve against the new cell before high-current charging begins.

Why the Galaxy Core Max reports wrong battery percentage after a cell swap

The Core Max uses a coulomb counter in the fuel gauge IC that was calibrated against the discharge curve of the original cell. A new cell has slightly different internal resistance and voltage-versus-capacity behaviour. Until the IC recalibrates, the percentage reading lags or jumps — the hardware is not faulty. One full discharge-charge cycle with fast charging off writes a new baseline to the fuel gauge and stabilises the percentage readout.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops sharply under combined modem and display load — what engineers call a voltage cliff. The phone's protection circuit triggers a shutdown before the percentage display reaches zero because the cell cannot sustain the voltage rail under peak draw. It is not a defective battery — it is the fuel gauge IC reporting a percentage that does not yet map accurately to this cell's load curve. Run two full unconstrained discharge-charge cycles and the shutdowns will stop as the IC learns the new curve. If the problem persists after three cycles, check that the battery connector is fully seated and the contact pins are clean.

Compatible Models

Galaxy Core Max SM-G5109 Galaxy Core Max Duos SM-G510F SM-G5108 SM-G5108Q

Replaces Part Numbers

EB-BG510CBC

Technical Specifications

Voltage3.85V
Amp Hours2000mAh
Capacity2000mAh
Rate7.7Wh
Net Weight35g /1.23 oz
Gross Weight60g /2.12 oz
Approximate Weight60g /2.12 oz
Dimension 54.90 x 50.60 x 6.00mm

Product Highlights

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

Frequently Asked Questions

My Galaxy Core Max won't turn on after the replacement battery sat in a drawer for a few months — is it dead?

A Li-ion cell that drops below roughly 2.5V enters BMS lockout to prevent damage, and storage accelerates that drain. Plug the phone into a wall charger — not a computer USB port — and leave it for 30–40 minutes without attempting to power it on. The charge IC will trickle current into the cell until the BMS re-initialises above the lockout threshold, at which point the phone will boot normally.

Fast charging stopped working after I fitted this battery — the phone just slow-charges now.

Samsung's charge IC runs a handshake on the first cycle to verify the cell's BMS before enabling high-current charge modes. On a new cell, that handshake sometimes defaults to standard charge rate until one full cycle completes. Charge the phone to 100% at the slow rate, let it discharge fully to auto-shutdown, then reconnect the charger — fast charging typically re-engages on that second cycle.

The battery percentage jumps around erratically — goes from 60% straight to 35% with no warning.

The coulomb counter in the fuel gauge IC is still using the discharge curve from the old, degraded cell. The new cell's voltage-versus-capacity profile is different, so the IC misreads remaining charge. This is not a cell defect. Run two complete discharge-charge cycles with the screen on and Wi-Fi active to give the IC real load data, and the percentage readings will stabilise.

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