Samsung GT-C3350 Replacement Battery AB803443BU 3.7V 1100mAh
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Samsung GT-C3350 Replacement Battery AB803443BU 3.7V 1100mAh - 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 GT-C3350 Replacement Battery AB803443BU 3.7V 1100mAh - is backordered and will ship as soon as it is back in stock.
Voltage
3.7V
Amp
1100mAh
Samsung GT-C3350 Xcover — 3.7V Li-ion Replacement Battery (AB803443BU)
This is a 3.7V, 1100mAh Li-ion cell built to the AB803443BU specification. It fits the Samsung GT-C3350, Xcover C3350, and Solid Xcover candybar phones. The cell measures 46.50 × 33.70 × 7.50mm and drops into the original battery compartment using the stock connector.
- GT-C3350 and Xcover Solid platform: All three listed models run the same 3.7V battery rail with identical connector pinout and BMS handshake logic, which is why one cell covers the full range. The AB803443BU part number confirms cross-model compatibility at the OEM level.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the GT-C3350 platform. The BMS accepted the cell without error, charge termination triggered correctly at full capacity, and the protection circuit responded normally to low-voltage cutoff conditions.
- Fuel gauge recalibration on first cycle: After installing a new cell, run one full discharge to automatic power-off, then charge uninterrupted to 100% before resuming normal use. The GT-C3350 fuel gauge IC calibrates its coulomb counter against this first full cycle — skipping it causes the phone to report inaccurate percentages from day one.
Sudden shutdown at 20–30% on the GT-C3350 after cell replacement
The GT-C3350 fuel gauge IC stores a discharge curve calibrated to the old, degraded cell. When a fresh cell with a steeper voltage curve is installed, the IC misreads remaining capacity and triggers shutdown well before the cell is actually depleted. The voltage drop under screen or radio load hits the cutoff threshold faster than the gauge expects. One full discharge-to-shutdown followed by an uninterrupted charge to 100% forces the IC to rebuild its reference curve against the new cell.
Phone feels warm near the battery compartment on the first few charges
A new Li-ion cell has higher internal impedance than a broken-in cell. In the first two to three charge cycles, the charge IC pushes current into a cell that resists it slightly more than normal, generating mild heat at the battery interface. This is a temporary condition and reduces as the cell cycles. If the phone feels hot — not just warm — above 45°C, stop the charge and check that the contacts are seated flat against the cell terminals with no gap.
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
My GT-C3350 powers off at around 25% after I put in the new battery — why?
The fuel gauge IC on the GT-C3350 is still running a discharge curve mapped to the old, degraded cell. When a fresh 1100mAh cell drops voltage under modem or screen load, it hits the IC's cutoff threshold earlier than the percentage reading suggests. This is a calibration mismatch, not a faulty battery. Run the phone down to automatic shutdown once, then charge it uninterrupted to 100% — that single full cycle resets the coulomb counter to the new cell's actual curve.
The battery percentage jumps around erratically — it reads 60%, then skips to 80%, then drops to 40% within minutes.
Erratic percentage readings mean the fuel gauge IC has no valid reference curve for the new cell yet. The GT-C3350 stores its last calibration state in memory, and a cell swap invalidates that stored curve. The IC is estimating capacity rather than tracking it accurately. Do one full uninterrupted discharge-to-shutdown followed by a full charge to 100% without removing the phone from the charger — after that cycle the IC locks onto the correct curve and readings stabilise.
The phone won't turn on at all after the replacement battery sat in a drawer for a few months before I installed it.
Li-ion cells self-discharge in storage, and if the AB803443BU cell dropped below roughly 2.5V before installation, the BMS entered lockout mode to prevent cell damage. The phone will not power on from this state because the BMS is blocking current until it sees a safe recovery charge. Connect the phone to a charger and leave it for at least 20–30 minutes without attempting to power it on — the charge IC trickle-charges the cell back above the BMS recovery threshold, typically around 3.0V, at which point the BMS releases and the phone boots normally.
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