AT&T Galaxy Note SGH-i717 Replacement Battery 3.7V 2500mAh

AT&T SGH-i717 Galaxy Note — 3.7V Li-ion Replacement Battery (EB615268VU)

This 3.7V, 2500mAh Li-ion cell replaces the original EB615268VU battery in the AT&T Samsung Galaxy Note SGH-i717. It also fits the Galaxy Note LTE and Galaxy Note 4G variants on the same platform. Dimensions are 67.50 × 51.90 × 5.90mm — a direct physical match for the stock battery slot.

• SGH-i717, Galaxy Note LTE, Galaxy Note 4G: All three share the same battery bay geometry, 3.7V nominal rail, and EB615268 connector pinout. The BMS handshake protocol is identical across the group, so one cell covers the full variant range without modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the SGH-i717 motherboard. The BMS accepted the cell without triggering fault flags, and charge termination fired correctly at 4.2V.
• Fuel gauge recalibration on first install: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell.

Why the SGH-i717 reports wrong battery percentage after a cell swap

The Galaxy Note uses a coulomb-counter fuel gauge IC that builds its charge model against the original cell's internal resistance profile. When a new cell goes in, the IC is still referencing the old degraded curve. This causes the percentage readout to drift — sometimes reading 40% when the actual state of charge is closer to 60%, or vice versa. One full discharge to automatic shutdown followed by an uninterrupted charge to 100% forces the IC to reset its calibration against the new cell's actual capacity.

Sudden shutdown at 20–30% on the replacement cell

This happens when the modem or display pulls a high instantaneous current and the cell voltage sags below the BMS low-voltage cutoff — even though the fuel gauge still shows charge remaining. On a freshly installed cell, the IC has not yet mapped the new cell's voltage-under-load curve, so it cannot predict this sag. The fix is the same recalibration cycle: run the phone down to automatic shutdown, then charge to 100% without interruption. After one full cycle, the fuel gauge IC tracks load-voltage sag accurately and the premature shutdowns stop.