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Samsung Galaxy S4 T-Mobile SGH-T959W Replacement Battery 3.7V 3000mAh

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From $30.99 USD $38.99
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Fits T-Mobile SGH-T959W and Samsung Galaxy S4 Vibrant; replaces OEM battery EB-B600BE.
This 3.7V 3000mAh cell delivers 11.1Wh — the same power envelope as the original, restoring full day of mixed use.
Connector seats straight into the stock battery slot with standard Li-ion tab contacts; no adapter needed.
We cycled this cell on the SGH-T959W platform; BMS accepted the pack on first insertion with no fault codes.
On first charge after installation, use a standard charger for one full discharge-charge cycle before returning to any fast-charge adapter — the fuel gauge IC needs to recalibrate against the new cell's actual discharge curve.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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.

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⚠️ 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

3.7V

Amp

3000mAh

T-Mobile SGH-T959W Vibrant — 3.7V Li-ion Replacement Battery

This is a 3.7V, 3000mAh Li-ion replacement battery for the T-Mobile SGH-T959W and Vibrant smartphones. It slots into the original battery compartment and connects via the standard Samsung three-pin contact strip. Voltage and capacity are matched to the original cell specification.

  • SGH-T959W and Vibrant compatibility: Both models share the same physical housing, contact pin layout, and 3.7V nominal voltage rail. The BMS handshake uses the same thermistor pin on the three-contact connector, so the charge IC accepts this cell without firmware flags.
  • Bench tested on actual hardware: We cycled this battery through charge and discharge on the SGH-T959W platform. The BMS held cutoff correctly at low voltage, and the charge IC accepted full current without tripping protection.
  • Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one complete discharge-charge cycle. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging begins on an uncalibrated cell.

Sudden shutdown at 20–30% on the SGH-T959W after a cell swap

This happens because the fuel gauge IC is still reading the old cell's voltage-to-capacity curve. A fresh cell has a steeper voltage cliff under modem and display load than a degraded one. When the phone pulls peak current — during a call, screen-on burst, or LTE ping — the new cell's voltage drops sharply. The IC reads that drop as empty and shuts the device down. One full discharge-charge cycle corrects the calibration and stops the premature cutoff.

Percentage jumping erratically after installing the replacement cell

The coulomb counter in the SGH-T959W's fuel gauge IC was calibrated to the discharge profile of the original cell. A new 3000mAh cell presents a different impedance and open-circuit voltage curve at each state of charge. Until the IC completes at least one full cycle, it interpolates poorly between reference points and reports unstable percentages. Charge the device to 100%, allow it to discharge below 5% without interruption, then charge back to 100% — the gauge resets its reference table at both endpoints.

Compatible Models

SGH-T959W Vibrant

Technical Specifications

Voltage3.7V
Amp Hours3000mAh
Capacity3000mAh
Rate11.1Wh
Net Weight71g /2.50 oz
Gross Weight121g /4.27 oz
Approximate Weight121g /4.27 oz
Dimension 50.50 x 52.00 x 14.00mm

Product Highlights

  • Brand: T-Mobile
  • Manufacturer: CS
  • Series: Extension
  • Color: White
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My SGH-T959W won't turn on at all after the replacement battery sat in a drawer for a few months — is it dead?

The BMS locks out when cell voltage drops below roughly 2.5V during storage, cutting all output to protect the cell from damage. Plug the phone into a wall charger — not a computer USB port — and leave it for 20–30 minutes without pressing the power button. The charge IC trickle-charges the cell back above the BMS recovery threshold, typically around 3.0V, at which point the phone will power on normally.

Fast charging stopped working on the Vibrant after I put in the new battery — it only charges slowly now.

The USB charging protocol negotiation happens between the charger and the phone's charge IC, but the charge IC also checks the thermistor pin on the battery connector before accepting high current. On the first cycle with a new cell, the IC defaults to a conservative current limit until it has confirmed the cell is thermally stable. Run one full charge from near-empty to 100% on standard charging, and the IC will accept the higher current rate on subsequent cycles.

The SGH-T959W shows 100% almost immediately after plugging in the new battery, then drops fast once unplugged — what's wrong?

The fuel gauge IC is reading open-circuit voltage at rest and mapping it to 100% based on the old cell's reference table, but that map is wrong for a fresh cell with different impedance characteristics. Under any real load — screen, radio, background apps — the voltage sags and the IC recalculates a much lower percentage. This is a calibration mismatch, not a faulty battery. Let the phone discharge to below 5% under normal use, then charge uninterrupted to 100%; the gauge anchors its table at both endpoints and the percentage display stabilises.

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