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EB424255VA Samsung SPH-M330 Replacement Battery 3.7V 940mAh

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New arrival
From $22.99 USD $28.99
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Fits Samsung SPH-M330, SPH-M340, SPH-M350 and replaces EB424255VA.
Delivers 3.7V at 940mAh capacity for basic calling and messaging on mid-2000s Samsung phones.
Connector slides into the battery slot with a single locking tab; orientation marked on housing.
We bench-tested the EB424255VA against stock discharge curves; BMS accepted charge without early cutoff.
On first use, let the phone complete one full discharge-charge cycle before heavy texting loads.
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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

3.7V

Amp

940mAh

Samsung SPH-M330 / SPH-M350 Series — 3.7V Li-ion Replacement Battery (EB424255VA)

This is a 3.7V, 940mAh Li-ion replacement battery for the Samsung SPH-M330, SPH-M340, SPH-M350, and Seek SPH-M350, among other compatible models. It replaces OEM part numbers EB424255VA, EB424255VU, EB424255VABSTD, and EB424255VUCSTD. The cell matches original dimensions at 54.72 × 41.58 × 4.12mm and seats directly in the factory battery bay.

  • SPH-M330 / M340 / M350 platform fit: These models share the same battery bay dimensions, voltage rail, and connector pinout. The BMS handshake is consistent across the series, so one cell covers all listed variants without modification.
  • Bench tested on actual hardware: We cycled this cell through full charge and discharge on the SPH-M350. The BMS handled charge termination cleanly at 4.2V, and protection cutoff triggered correctly at low-voltage threshold without latching.
  • Fuel gauge recalibration after swap: On first use, disable any power-saving modes and run one complete discharge-to-charge cycle at standard current. This lets the phone's fuel gauge IC map the new cell's discharge curve before the OS reports capacity accurately.

Why the SPH-M330 reports wrong battery percentage after a cell swap

The fuel gauge IC in the SPH-M330 uses a coulomb counter calibrated to the original cell's discharge curve. When a new cell goes in, the stored curve no longer matches actual cell behaviour. The phone reads voltage and translates it to a percentage using outdated reference data, so the number on screen drifts from reality. One full uninterrupted discharge down to auto-shutoff, followed by a full charge to 4.2V, resets the reference and brings the percentage back in line.

Sudden shutdown at 20–30% on the replacement cell

This happens when the modem transmits or the screen backlight spikes current draw, causing cell voltage to sag below the BMS cutoff threshold even though the gauge shows charge remaining. A fresh cell with an uncalibrated fuel gauge IC makes this worse — the OS thinks 25% remains, but cell voltage has already dropped to the 3.0V cutoff zone under load. The fix is the same full recalibration cycle: discharge to auto-shutoff, charge fully. After one cycle, the gauge IC anchors its low-voltage warning to a more accurate state-of-charge point, and premature shutdowns stop.

Compatible Models

SPH-M330 SPH-M340 SPH-M350 Seek SPH-M350 SPH-M550 SPH-M630 Exclaim SPH-M550 Highnote SPH-M630 Sunburst A697 SCH-R561 Messager R450 Messager II R560 Rant M540 SGH-A927 Flight II Gravity 3 SGH-T479 Gravity Touch SGH-T669 Messager Touch SCH-R630 SGH-T359 Evergreen A667 Solstice II A817 Flight II A927 Seek M350 Messager Touch R630 Gravity 3 T479 Touch T669 GT-C5530 Solstice II Trender SPH-M380 Evergreen SGH-A667 SGH-T369 SGH-A817 Gravity TXT SGH-T379 SCH-R380 Comment R380 GT-S3350 Chat 335 Smiley M359 SCH-R631 Trender M380 Freeform III R380 Character R640 SGH-749 Corby II GT-S3850 SCH-R640 Smiley T669 Gravity T479 Gravity T359 GT-S5220 GT-S5222 Tocco Lite 2 Star 3 Star 3 Duos Ch SCH-R390 Freeform 4 Messager SCH-R450

Replaces Part Numbers

EB424255VA EB424255VABSTD EB424255VUCSTD EB424255VU

Technical Specifications

Voltage3.7V
Amp Hours940mAh
Capacity940mAh
Rate3.48Wh
Net Weight19.1g /0.67 oz
Gross Weight44.1g /1.56 oz
Approximate Weight44.1g /1.56 oz
Dimension 54.72 x 41.58 x 4.12mm

Product Highlights

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

Frequently Asked Questions

My SPH-M330 shows 30% battery and then shuts off instantly — is the new cell defective?

The cell is not defective. The fuel gauge IC is still running the discharge curve from the old battery, so it reports 30% while the actual cell voltage has already sagged below the BMS cutoff under modem or display load. Run one complete discharge to auto-shutoff and then charge uninterrupted to 4.2V. After that single calibration cycle, the percentage reading and the shutdown point will align correctly.

The phone won't turn on at all after the new battery sat in a drawer for a few months — what happened?

Li-ion cells self-discharge in storage, and if the cell dropped below roughly 2.5V the BMS entered lockout mode to prevent cell damage. The phone will not respond to the power button while BMS lockout is active. Connect the phone to a wall charger — not a PC USB port — and leave it for 20 to 30 minutes without pressing anything. The charge IC will trickle current into the cell until voltage rises above the BMS recovery threshold, at which point the battery will accept a normal charge.

Why does the phone feel warm near the battery during the first few charges after swapping the cell?

A new high-impedance cell generates more heat during the initial charge cycles than a broken-in cell does. The charge IC on the SPH-M350 series pushes current into the cell at a fixed rate, and a higher internal resistance means more energy converts to heat before the cell settles. This typically reduces after two or three full cycles as internal resistance drops. If the phone stays warm past the third full charge, check that no third-party charger is exceeding the 5V input spec.

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