About this replacement
Samsung Galaxy Y GT-S5360 — 3.7V Li-ion Replacement Battery (EB454357VU)
This 3.7V, 1350mAh Li-ion cell replaces the original EB454357VU battery in the Samsung Galaxy Y and its variants. It fits the GT-S5360, GT-S5380, GT-S5380D, and 18 additional models sharing the same battery bay and connector spec. Voltage and capacity match OEM figures exactly.
- Galaxy Y platform fit: The GT-S5360, GT-S5380, and related variants all draw from the same 3.7V single-cell architecture with an identical connector and battery bay footprint. One cell covers the full range without modification.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a GT-S5360 unit. The BMS accepted the charge handshake immediately, and the protection circuit tripped correctly at low-voltage cutoff — no negotiation errors on either end.
- Fuel gauge recalibration on first use: On first installation, disable any fast-charge mode and run one full discharge-to-charge cycle before normal use. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve, preventing erratic percentage readings from the first week onward.
Why the Galaxy Y reports the wrong battery percentage after a cell swap
The GT-S5360 uses a fuel gauge IC that builds its charge model from the discharge history of the installed cell. When you swap in a new cell, the IC still holds calibration data from the old, degraded battery. Until it re-learns the new cell's voltage-to-capacity curve, the displayed percentage drifts from actual charge state. One full uninterrupted discharge down to auto-shutoff, followed by a complete charge to 100%, resets the coulomb counter against the new cell. After that single cycle, percentage accuracy stabilises.
Sudden shutdown at 20–30% on the replacement cell
This is a voltage cliff issue, not a capacity defect. When the modem transmits or the screen brightness spikes, instantaneous current draw pulls the cell voltage below the BMS cutoff threshold — even though the fuel gauge still shows charge remaining. It happens most often when the fuel gauge IC hasn't yet calibrated to the new cell's internal resistance profile. Run one full discharge cycle and check that the cutoff doesn't repeat. If the phone still shuts down before 15%, measure resting cell voltage with a multimeter — it should read above 3.6V at the reported 25% level.