About this replacement
Samsung GT-S5570 Galaxy Mini Series — 3.7V Li-ion Replacement Battery (EB494353VU)
This is a 3.7V, 1300mAh (4.81Wh) Li-ion replacement battery for the Samsung Galaxy Mini and related GT-S series devices. It fits the GT-S5570, GT-S5250, GT-S5330, and over 40 additional Samsung models sharing the EB494353VU/EB494353VA cell specification. Dimensions are 52.00 × 42.00 × 5.00mm — verify your original battery before fitting.
- GT-S5570 family compatibility: These models share a common voltage rail at 3.7V nominal and use the same contact layout and BMS handshake. The EB494353VU part number covers both the VU and VA suffix variants — the difference is region coding on the label, not the cell chemistry or connector pinout.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on GT-S5570 hardware. The BMS accepted the Samsung charge protocol without rejection, and charge termination triggered correctly at full capacity with no overcharge event detected.
- Fuel gauge recalibration after install: On first use, disable any fast-charge adapter and run the phone through one full discharge-to-charge cycle on a standard 5V/1A charger. This lets the fuel gauge IC map its coulomb counter to the new cell's discharge curve before higher-current charging is applied to an uncalibrated cell.
Why the GT-S5570 reports wrong battery percentage after a cell swap
The GT-S5570 uses a fuel gauge IC that stores a learned discharge curve from the original cell. When a new cell goes in, the IC compares incoming voltage readings against an outdated reference — so the percentage displayed doesn't match actual charge state. This is not a fault with the replacement cell. One complete discharge cycle down to auto-shutoff, followed by an uninterrupted charge to 100%, forces the IC to rebuild its reference table against the new cell. After that single cycle, percentage reporting stabilises.
Sudden shutdown at 20–30% on the replacement cell
This happens when the cell voltage drops below the BMS cutoff threshold under load — typically during screen-on bursts or a mobile data spike — while the fuel gauge still reads 20–30%. The original cell had a softened discharge curve from age; the new cell has a steeper voltage cliff at low states of charge, which the uncalibrated fuel gauge doesn't anticipate. The BMS trips at approximately 3.0V per cell to protect against deep discharge, cutting the phone off before the percentage counter reaches zero. Run the post-install calibration cycle described above — this corrects the fuel gauge's low-voltage prediction and eliminates the early cutoff.