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Samsung Galaxy Ace 3 GT-S7270 Replacement Battery 3.8V 1500mAh

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From $28.99 USD $35.99
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Fits Samsung Galaxy Ace 3 GT-S7270, GT-S7272, and replaces OEM part numbers B100AE, GH43-03948B, EB-B100AE.
3.8V, 1500mAh lithium-ion cell delivers 5.7Wh to sustain the modem, screen, and processor without early shutdown.
Connector is a flat two-pin JST type with notched plastic housing; tabs slide straight into the battery slot vertically.
We bench-tested this cell on a GT-S7270 motherboard; the BMS accepted the charge handshake on first cycle and held voltage stable under load.
On first use, run one complete discharge-to-shutdown and full recharge cycle without enabling fast charging — the fuel gauge IC must recalibrate against this cell's discharge curve before any high-current charging.
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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

3.8V

Amp

1500mAh

Samsung Galaxy Ace 3 GT-S7270 / GT-S7272 — 3.8V Li-ion Replacement Battery (EB-B100AE)

This is a 3.8V 1500mAh Li-ion replacement battery for the Samsung Galaxy Ace 3. It fits the GT-S7270 and GT-S7272 variants and crosses to OEM part numbers B100AE, GH43-03948B, and EB-B100AE. Pull the back cover, swap the cell, and the phone powers on without any tools.

  • GT-S7270 and GT-S7272 compatibility: Both variants use the same 3.8V single-cell architecture, the same connector pinout, and the same BMS handshake protocol — one battery fits both without modification.
  • Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on a GT-S7270. The BMS accepted the charge IC handshake on first connection, and the protection circuit triggered correctly at the low-voltage cutoff threshold.
  • Fuel gauge recalibration on first cycle: On first use after installation, disable fast charging and run one complete discharge-charge cycle down to automatic shutdown and back to 100%. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated state.

Sudden shutdown at 20–30% on the Galaxy Ace 3 after a cell swap

The Galaxy Ace 3 fuel gauge IC stores a discharge curve calibrated to the original cell. A new cell has a slightly different internal resistance profile, so the IC misreads the remaining capacity. When the modem, screen backlight, or GPS draw a short current spike, the phone's reported 25% is already below the real voltage floor. The phone shuts down to protect the cell even though the percentage looks safe. One full discharge-charge cycle without fast charging resets the coulomb counter and eliminates this behaviour.

Phone warm near the battery compartment during the first charge

A new Li-ion cell arrives with slightly higher internal impedance than a broken-in cell. The charge IC on the Ace 3 pushes current at the same rate it used with the old, lower-impedance cell, so a fraction more energy converts to heat in the first few cycles. The warmth is localised to the back cover near the battery and drops off after two or three full cycles as impedance settles. If the back cover becomes hot to the touch — not just warm — disconnect the charger and let the cell rest at room temperature before continuing.

Compatible Models

GT-S7270 GT-S7272 Galaxy Ace 3 Galaxy Ace 3 3G GT-S7270L Galaxy Star Plus GT-S7262 Galaxy Star Pro GT-S7260 Z1 Z1 Duos SM-Z130H SM-Z130H/DS SM-Z130H Duos Galaxy Z1 Galaxy Ace 4 Neo SM-G318ML GT-S7898 GT-S7278U GT-S7390 GT-S7392 Galaxy Trend Lite Galaxy Trend Lite 2 SM-G318H

Replaces Part Numbers

B100AE GH43-03948B EB-B100AE

Technical Specifications

Voltage3.8V
Amp Hours1500mAh
Capacity1500mAh
Rate5.7Wh
Net Weight27g /0.95 oz
Gross Weight52g /1.83 oz
Approximate Weight52g /1.83 oz
Dimension 59.76 x 50.41 x 4.14mm

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 Galaxy Ace 3 keeps shutting off at around 25% after I put in the new battery — what's happening?

The fuel gauge IC is still using the discharge curve it mapped to the original cell. When the screen, modem, or GPS pull a current spike, the real cell voltage drops below the cutoff even though the percentage reads 25%. Run one full discharge to automatic shutdown, then charge uninterrupted to 100% with fast charging disabled. After that single cycle the coulomb counter recalibrates and the shutdowns stop.

The phone won't turn on at all after the replacement battery sat in a drawer for a few months before I installed it — is the battery dead?

A Li-ion cell in storage self-discharges slowly, and if it dropped below roughly 2.5V the BMS entered lockout mode to prevent cell damage. Plug the phone into a wall charger — not a PC port — and leave it connected for at least 30 minutes before pressing the power button. The charge IC needs time to trickle current into the locked-out cell before the BMS releases and allows normal charging. If the battery icon appears within that window, the cell is recovering normally.

The battery percentage jumps around erratically — goes from 60% to 80% and back — right after installation. Is the battery faulty?

The fuel gauge IC on the Ace 3 uses a stored discharge model built from hundreds of charge cycles on the original cell. A new cell's voltage-to-capacity relationship doesn't match that model, so the IC miscalculates and the reported percentage jumps. This is a calibration issue, not a faulty cell. Complete two full discharge-charge cycles with fast charging off and the IC will converge on the new cell's actual curve, after which the percentage should track steadily.

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