Samsung YP-T8 MP3 Player Replacement Battery 3.7V 800mAh

Samsung YP-T8 — 3.7V Li-ion Replacement Battery (YP-T8)

This is a 3.7V 800mAh Li-ion cell for the Samsung YP-T8 portable media player. It fits the YP-T8 directly and matches the original connector and footprint. Capacity figures are taken from our product data: 800mAh / 2.96Wh.

• YP-T8 fit: The YP-T8 uses a single-cell 3.7V Li-ion pack with a compact form factor — 42.66 × 30.79 × 4.59mm. That specific cell size and the BMS handshake are why this battery works in the YP-T8 and not in adjacent Samsung media player models with different connector pinouts.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the YP-T8 platform. The BMS accepted full charge current without triggering protection cutoff, and the board read the cell voltage correctly through the full discharge curve.
• Post-swap charge protocol for the YP-T8: Media players like the YP-T8 often enter deep discharge protection state after long storage. Connect the charger immediately after installing and leave it for at least 30 minutes before attempting to power on — the device needs a slow trickle charge before it will accept normal charge current.

Battery percentage jumping after a cell swap on the YP-T8

After fitting a new Li-ion cell, the YP-T8's fuel gauge reads from voltage thresholds baked into the original firmware calibration. A fresh cell has a slightly different discharge curve than a worn original, so the percentage display recalibrates over the first few cycles. You may see the indicator jump from 80% to 40% without warning during early use. Run two or three full charge-to-discharge cycles and the readings will stabilise — the cell itself is not faulty.

Playback cutting out before the battery indicator shows empty

The audio amplifier in the YP-T8 draws a brief current spike when driving output at higher volumes. Near the end of the discharge curve — typically below 3.5V — the cell can no longer sustain that spike without voltage sagging below the amplifier's minimum rail. The player cuts out or reboots even though the gauge still shows a few percent remaining. This is a voltage-sag issue, not a capacity issue. Lower the playback volume at the end of a charge cycle and the player will reach true cut-off before dropping out.