EB504465LA Samsung SCH-R720 Replacement Battery 3.7V 1700mAh

Verizon SCH-R720 Fascinate — 3.7V Li-ion Replacement Battery (EB504465LA)

This is a 3.7V Li-ion cell rated at 1700mAh (6.29Wh), built to the same form factor as the original EB504465LA. It fits the Samsung SCH-R720 Fascinate, Admire, and Vitality variants on the Verizon network. The cell slots directly into the standard battery bay with no modification.

• SCH-R720 variant compatibility: The Fascinate, Admire, and Vitality all share the same battery bay dimensions, connector pinout, and 3.7V nominal rail. One cell covers all three because Samsung used the same hardware platform across each variant.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the SCH-R720 platform. The BMS handed off charge termination correctly at 4.2V and held protection trip thresholds in range at the low-voltage cutoff.
• Fuel gauge recalibration on first use: After fitting this cell, run one complete discharge down to auto-shutoff, then charge uninterrupted to 100% before normal use. The SCH-R720 fuel gauge IC carries the old cell's discharge curve in memory — this single cycle overwrites it so percentage readings track accurately.

Sudden shutdown at 20–30% on the SCH-R720 after a cell swap

The SCH-R720's processor, modem, and AMOLED display pull current simultaneously during active use. A new cell with a slightly different discharge curve can hit a voltage cliff under that combined load while the fuel gauge still reads 20–30%. The phone cuts out because actual cell voltage drops below the protection threshold, even though the coulomb counter hasn't reached zero. One full calibration cycle — full discharge to shutoff, full charge to 100% — aligns the fuel gauge IC to the new cell's actual curve and eliminates the early cutoff.

Phone warm near the battery compartment on first few charges

A fresh Li-ion cell has higher internal impedance than a broken-in one. During the first two or three charge cycles, the charge IC pushes current into that higher-impedance cell, and some energy converts to heat rather than stored charge. This is normal and subsides as the cell's impedance drops with cycling. If the back of the phone feels hot rather than warm, or if charging stops unexpectedly, check that the battery contacts are seated flat and free of debris before charging again.