BLU DASH 3.5 C654804130T Replacement Battery 3.7V 1300mAh

BLU DASH 3.5 / D170 — 3.7V Li-ion Replacement Battery (C654804130T)

This is a 3.7V, 1300mAh Li-ion cell built to fit the BLU DASH 3.5 and D170 smartphones. It replaces part number C654804130T and slots into the same battery bay as the original. Use the capacity figure from this listing — 1300mAh — not third-party sources.

• DASH 3.5 and D170 compatibility: Both models run the same voltage rail and use an identical connector footprint with the same BMS handshake protocol, which is why one cell covers both. Swapping between them requires no wiring changes.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the DASH 3.5 platform. The BMS accepted the cell without triggering an over-voltage cutoff, and the charge IC reached full termination voltage correctly on the first cycle.
• Fuel gauge recalibration after installation: After fitting this cell, run one full discharge to near-zero followed by an uninterrupted charge to 100% before normal use. The DASH 3.5 fuel gauge IC calibrates its coulomb counter against that first complete curve — skipping this step causes erratic percentage readings for several days.

Sudden shutdown at 20–30% on the DASH 3.5 after a cell swap

This happens when the fuel gauge IC is still mapped to the old cell's discharge curve. The new cell hits a voltage cliff — typically around 3.5–3.6V under modem or display load — faster than the gauge expects. The phone reads 25% but the cell voltage has already dropped below the shutdown threshold. One complete discharge-charge cycle forces the coulomb counter to remap to the new cell's actual curve and eliminates the premature cutoff.

Device not powering on after the replacement cell sat in storage

Li-ion cells self-discharge in storage, and if this battery dropped below approximately 2.5V per cell, the BMS will have entered lockout mode to prevent deep-discharge damage. The phone will show nothing — no charging indicator, no boot screen. Connect the phone to a wall adapter rated at least 1A and leave it for 15–20 minutes before attempting to power on. The charge IC on the DASH 3.5 trickle-charges a locked-out cell at a low recovery current until the cell voltage rises above the BMS re-enable threshold of around 2.9V.