EB-L1G6LLUC Galaxy S 3 Replacement Battery 3.8V 2100mAh
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EB-L1G6LLUC Galaxy S 3 Replacement Battery 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.
EB-L1G6LLUC Galaxy S 3 Replacement Battery 3.8V 2100mAh - is backordered and will ship as soon as it is back in stock.
Voltage
3.8V
Amp
2100mAh
T-Mobile Galaxy S 3 — 3.8V Li-ion Replacement Battery (EB-L1G6LLUC)
This is a 3.8V, 2100mAh Li-ion cell built to fit the Samsung Galaxy S 3 and Galaxy S III. It replaces OEM part numbers EB-L1G6LLUC, EB-L1G6LVA, EB-L1G6LLK, EB-L1G6LLA, and EB585158LP. The cell slots into the removable battery bay and connects to the same spring contacts as the original.
- Galaxy S 3 and S III compatibility: The S 3 and S III share the same removable battery form factor, connector pitch, and 3.8V nominal voltage rail across all regional variants. The BMS on each variant communicates with the phone's charge IC using the same handshake protocol, so one cell covers the full lineup without modification.
- Bench tested on actual hardware: We ran this cell in a Galaxy S III body and monitored BMS behavior across charge and discharge. The protection circuit tripped correctly at the low-voltage cutoff floor and accepted a full charge cycle without thermal events or charge IC rejection.
- Fuel gauge recalibration on first install: Disable fast charging for the first complete discharge-charge cycle after swapping this cell. The fuel gauge IC is still calibrated to the old cell's discharge curve. One full cycle at standard current lets the coulomb counter reset against the new cell before high-current charging begins.
Sudden shutdown at 20–30% on the replacement cell
This happens because the fuel gauge IC was calibrated to the discharge curve of the old, degraded cell. When the new cell hits a voltage the phone's gauge reads as 20–30%, the actual cell voltage may be dropping faster under modem or display load than the IC expects — and the BMS cuts power to protect the cell. The fix is a full, uninterrupted discharge down to automatic shutdown followed by a complete charge to 100% with the phone off or idle. After one or two of these cycles, the coulomb counter recalibrates and the percentage readout stabilises.
Phone feels warm near the battery during the first few charges
A new cell has higher internal impedance than a broken-in cell. The charge IC pushes current into that resistance, and some of that energy converts to heat before the cell's impedance drops after a few cycles. This is normal and should reduce noticeably after two or three full charge cycles. If the warmth persists past the third cycle or the phone is hot to the touch, check that the battery contacts are seated flat — a tilted cell increases resistance at the contact points and keeps impedance elevated.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: T-Mobile
- 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 S 3 just dies suddenly when the battery shows around 25% — why does this keep happening with the new cell?
The phone's fuel gauge IC is still using the discharge curve it learned from your old, degraded battery. The new cell's voltage drops at a different rate under load — specifically during modem transmissions and screen-on bursts — and the BMS cuts power before the gauge catches up. Run one complete discharge to automatic shutdown, then charge uninterrupted to 100% at standard (non-fast) charge speed. After that cycle, the coulomb counter recalibrates to the new cell and the shutdowns stop.
The battery percentage is jumping around erratically — went from 60% to 41% in two minutes without me doing anything heavy.
The Galaxy S 3 fuel gauge IC stores a charge model built from the previous cell's behaviour. After a cell swap, the IC is reading voltage from a cell with a different impedance profile and capacity, so the percentage output is unreliable until it relearns. Force a full recalibration: drain the phone to automatic shutdown, then charge to 100% with the screen off and no apps syncing in the background. The erratic jumps should level out within two full cycles — if they don't, check that the battery contacts aren't bent, because a loose connection causes voltage noise that confuses the coulomb counter further.
Fast charging stopped working after I put this replacement battery in — the phone just charges slowly now.
On the first cycle after a cell swap, the charge IC in the Galaxy S 3 sometimes falls back to a conservative charge profile because the new BMS presents a different impedance signature than the cell it last logged. This is a protective response, not a fault. Power the phone fully off, charge to 100%, then restart — most users see fast charge re-engage on the second cycle once the charge IC has completed one full handshake with the new cell's BMS. If it still defaults to slow charge after two full cycles, confirm the charging cable and adapter are rated at the correct output, as the Galaxy S 3 charge IC will not escalate current if the source negotiation fails.
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