Emporia BTY26171 Elson EL560 Compatible Battery 3.7V 1100mAh

Emporia Elson EL560 / EL560 Dual — 3.7V Li-ion Replacement Battery (BTY26171)

This 3.7V, 1100mAh Li-ion battery replaces the BTY26171 cell in the Emporia Elson EL560 and EL560 Dual mobile phones. It slots into the original battery bay and connects to the same three-pin contact strip. Capacity figures come from the product data — 4.07Wh total energy.

• EL560 and EL560 Dual compatibility: Both variants share the same battery bay dimensions, connector pinout, and 3.7V nominal voltage rail. The EL560 Dual adds a second SIM slot but draws from the same cell — no separate battery circuit to account for.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the EL560 platform. The BMS accepted a full charge without triggering overcurrent cutoff, and the protection circuit responded correctly to simulated load spikes from the modem radio.
• Fuel gauge recalibration on first use: After fitting this cell, run one full discharge down to automatic shutdown, then charge uninterrupted to 100% before using the phone normally. The EL560's fuel gauge IC was calibrated against the original cell's discharge curve — skipping this step leaves the coulomb counter reading against stale data, causing erratic percentage reporting from day one.

Sudden shutdown at 20–30% on the EL560 after cell replacement

The EL560's fuel gauge IC maps remaining capacity by tracking cumulative charge and discharge current against a stored cell profile. A new cell has a slightly different internal resistance curve than the worn original, so the gauge loses accuracy in the lower charge range. When the modem transmits or the screen backlight peaks, current draw spikes briefly — if the cell voltage sags below the BMS cutoff threshold (typically 3.0V under load), the phone shuts down even though the gauge still shows charge remaining. One full discharge-to-shutdown cycle followed by a complete charge resets the coulomb counter and brings the percentage readings back into alignment with actual cell state.

EL560 not powering on after the replacement battery sat in storage

Li-ion cells self-discharge in storage, and if the BTY26171 dropped below approximately 2.5V per cell before installation, the BMS will have entered lockout mode to prevent further discharge damage. In this state the phone shows no charging indicator and appears completely dead. Connect the phone to a low-current charger — a standard 5V USB wall adapter works — and leave it for 15–30 minutes without pressing the power button. The BMS needs a trickle of voltage to exit lockout before it will accept a normal charge current. Once the charging indicator appears, let the battery reach full charge before powering on.