Samsung Galaxy S III Replacement Battery EB-L1G6LLZ 3.8V 2100mAh
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Samsung Galaxy S III Replacement Battery EB-L1G6LLZ 3.8V 2100mAh - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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
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
⚠️ 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.
Samsung Galaxy S III Replacement Battery EB-L1G6LLZ 3.8V 2100mAh - is backordered and will ship as soon as it is back in stock.
Voltage
3.8V
Amp
2100mAh
Samsung Galaxy S III / Baffin — 3.8V Li-ion Replacement Battery (EB-L1G6LLZ)
This is a 3.8V, 2100mAh Li-ion cell that replaces the original battery in the Samsung Galaxy S III, Galaxy S III LTE, Baffin, and 27 additional compatible variants. It matches the original connector pinout and BMS handshake profile. Voltage and physical dimensions — 63.00 × 50.40 × 5.40mm — are identical to the factory cell.
- Galaxy S III family compatibility: The S III platform — including LTE and regional Baffin variants — shares a single battery bay with identical connector orientation and the same 3.8V nominal rail. One cell covers the full lineup without modification.
- Bench tested on actual hardware: We ran this cell through full charge-discharge cycles on a Galaxy S III unit. The BMS accepted the handshake on first connection, charge current ramped correctly, and the fuel gauge IC began tracking without manual reset.
- First-cycle fast charge protocol: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate its coulomb counter against the new cell's discharge curve before high-current charging begins pushing into an uncalibrated baseline.
Why the Galaxy S III reports wrong battery percentage after a cell swap
The Galaxy S III uses a coulomb-counting fuel gauge IC that builds its charge model against the original cell's impedance and capacity curve. When a new cell goes in, the IC is still referencing the old degraded curve, so reported percentages are off — sometimes significantly. The fix is one full uninterrupted discharge down to automatic shutoff, followed by a full charge to 100% without interruption. After that cycle, the IC resets its reference points against the new cell and percentage reporting stabilises.
Sudden shutdown at 20–30% remaining on the replacement cell
This happens when the fuel gauge IC hasn't completed recalibration and the cell hits a voltage cliff under modem or display load. At high current draw, the uncalibrated cell drops below the 3.2V cutoff threshold faster than the IC predicts, triggering an emergency shutdown before the displayed percentage reaches zero. It is not a faulty cell — it is a calibration gap. Run the full discharge-charge recalibration cycle described above, and monitor resting voltage after shutdown: a healthy cell should read between 3.5V and 3.7V at the point of cutoff.
Compatible Models
Replaces Part Numbers
Technical Specifications
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
The phone won't turn on at all after the replacement battery sat in a drawer for a few months — is the cell dead?
Probably not dead, but the BMS has tripped into lockout. Li-ion cells that self-discharge below approximately 2.5V per cell trigger a protection cutoff that blocks normal charging. Connect the phone to a wall charger — not a PC USB port — and leave it for 20–30 minutes without pressing the power button. The charge IC will trickle current into the cell until it clears the lockout threshold, at which point the phone will show a charging indicator and boot normally.
Fast charging stopped working after I swapped the battery — it only charges slowly now.
On the first cycle after a cell swap, the Galaxy S III's charge controller can refuse to negotiate fast charge rates because the new BMS hasn't yet passed a full authentication handshake at higher current levels. This is normal on cycle one. Complete one full slow charge to 100%, then disconnect and reconnect the charger — fast charge should resume. If it still doesn't, confirm you're using the original Samsung wall adapter; third-party chargers often fail the proprietary charge protocol handshake entirely.
The battery percentage jumps erratically — drops 10% in seconds, then sits at the same number for ages.
Erratic percentage jumps are a fuel gauge IC recalibration symptom, not a defective cell. The IC is interpolating charge state from an outdated discharge curve and overshooting in both directions. Run one complete uninterrupted discharge — screen on, brightness at 50%, no charging — until the phone shuts itself off automatically, then charge uninterrupted to 100%. That single cycle gives the coulomb counter enough data to rebuild an accurate model against the new cell, and jumping should stop.
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