Tascam MP-GT1 Replacement Battery 3.7V 2600mAh E01587110A

Tascam MP-GT1 — 3.7V Li-ion Replacement Battery (E01587110A)

This 3.7V 2600mAh (9.62Wh) Li-ion battery replaces the original cell in the Tascam MP-GT1 portable guitar effects processor and audio interface. It restores mobile power so you can record and process guitar without an AC connection. OEM part references E01587110A and BP-L1C-22 both apply to this unit.

• MP-GT1 platform fit: The MP-GT1 runs its DSP effects engine and USB audio interface functions from a single 3.7V cell. This replacement matches the original connector orientation, BMS communication protocol, and physical footprint — 68.46 × 18.50 × 18.50mm — so the cell seats correctly in the chassis without modification.
• Bench tested on actual hardware: We ran this cell through charge-discharge cycles on an MP-GT1 unit and confirmed the BMS handshake completed without error flags. The protection circuit engaged correctly at the low-voltage cutoff threshold and accepted a standard CC/CV charge profile without thermal events.
• Post-install charge cycle on the MP-GT1: After fitting this cell, connect the MP-GT1 to its AC adapter and allow a full uninterrupted charge before first use. New cells and cells that have been stored discharged can trigger the device's deep-discharge protection state, which requires a slow trickle charge before the unit accepts normal current and reports an accurate percentage.

Battery percentage jumping erratically after cell swap on the MP-GT1

After installing a new cell, the MP-GT1's fuel gauge recalibrates its voltage thresholds against the new cell's discharge curve. Until that recalibration completes, the percentage readout can jump — showing 80%, then 45%, then 70% within a single session. This is not a fault with the cell. Run two to three full charge and discharge cycles and the indicator will stabilise as the firmware maps the actual capacity of the new cell.

Playback and effects processing cutting out before the battery reads empty

The MP-GT1's DSP and audio interface draw a spike of current when processing complex effect chains. Near the end of a cell's discharge curve, internal resistance rises and voltage sags under that load — even if the percentage gauge still reads above zero. The BMS interprets the sag as an undervoltage condition and cuts output to protect the cell. If this happens consistently, the indicated percentage at cutoff will be somewhere between 10% and 20%; treat that as your practical empty point and connect to AC power at that threshold.