Samsung Galaxy Y EB494353VU Replacement Battery 3.7V 1200mAh

Samsung Galaxy Mini GT-S5570 — 3.7V Li-ion Replacement Battery (EB494353VU)

This is a 3.7V, 1200mAh Li-ion battery for the Samsung GT-S5570 Galaxy Mini and related compact Android handsets. It also fits the GT-S5250, GT-S5330, and more than 40 additional Samsung models sharing the same cell format and connector. Dimensions are 53 × 43 × 5mm — physically identical to the original EB494353VU cell.

• GT-S5570 family compatibility: Every model on this fit list uses the same 3.7V single-cell architecture and identical battery connector pinout. The BMS handshake and thermistor line are wired the same way across the range, so one cell covers the full group.
• Bench tested on actual hardware: We cycled this cell in a GT-S5570 chassis and monitored BMS cutoff behaviour at both ends of the voltage window. The protection circuit tripped correctly at the low-voltage threshold and accepted charge current without fault flags through a full discharge-charge cycle.
• Fuel gauge recalibration on first use: After fitting this cell, run one complete discharge down to automatic shutdown, then charge uninterrupted to 100% before normal use. The GT-S5570's fuel gauge IC is calibrated against the old cell's discharge curve — skipping this step causes the percentage counter to read inaccurately from day one.

Why the Galaxy Mini reports wrong battery percentage after a cell swap

The GT-S5570 uses a coulomb-counter fuel gauge IC that builds its capacity model from previous charge cycles. When you replace the physical cell, the IC still holds the discharge curve of the degraded original. It maps the new cell's voltage against that old curve, which shifts percentage readings up or down by as much as 15–20%. The fix is a full conditioning cycle — drain to shutdown, then charge to 100% without interruption — so the IC can reset its reference points against the new cell.

Sudden shutdown at 20–30% on the replacement cell

This happens when the fuel gauge IC still thinks the cell is near end-of-life and has set a premature low-voltage cutoff threshold. The screen and modem together draw enough current to collapse cell voltage below the BMS trip point faster than the gauge expects — the phone cuts out even though the reported percentage looks safe. After the first full conditioning cycle, the IC recalibrates its cutoff mapping against the new cell's actual internal resistance. If shutdowns continue past two full cycles, check that the battery connector is fully seated — a partially connected thermistor line causes the charge IC to misread cell temperature and restrict current.