BLU Dash JR TV C545051145T Replacement Battery 3.7V 1450mAh

BLU Dash JR TV / Dash L Series — 3.7V Li-ion Replacement Battery (C545051145T)

This 3.7V, 1450mAh Li-ion cell replaces the original C545051145T battery in the BLU Dash JR TV, D141T, Dash L, D050u, and compatible models. It restores power to devices left unusable by a swollen, dead, or severely degraded original cell. Voltage and capacity match OEM spec exactly — no modification required.

• Dash JR TV and D-series platform fit: These models share the same battery bay geometry, 3.7V nominal rail, and connector pinout. The BMS handshake protocol is consistent across the D141T and D050u variants, so one cell covers the group without firmware conflicts.
• Bench tested on actual hardware: We cycled this cell through full discharge and charge on a Dash JR TV unit. The BMS accepted the cell without fault codes, charge termination triggered correctly at 4.2V, and the protection circuit tripped cleanly on a simulated overcurrent draw.
• Fuel gauge recalibration on first use: After installing this cell, disable fast charging and run one complete discharge down to automatic shutdown, then charge uninterrupted to 100%. This gives the fuel gauge IC a clean reference point against the new cell's actual discharge curve before heavy loads stress an uncalibrated counter.

Why the Dash JR TV reports wrong battery percentage after a cell swap

The fuel gauge IC on BLU's budget smartphone line uses a coulomb counter that learns the cell's capacity over time. When the original cell degrades, the IC adjusts its model downward. A new 1450mAh cell arrives with far more capacity than the IC expects, so early readings are off — often showing full charge draining to 50% almost instantly. One uninterrupted full discharge-to-shutdown followed by a full charge resets the counter's reference. After that single cycle, percentage readings stabilise.

Sudden shutdown at 20–30% on the replacement cell

This happens when the fuel gauge IC hasn't recalibrated yet and the phone hits a voltage cliff under modem or display load. The cell voltage drops sharply below the BMS low-voltage cutoff — around 3.0V per cell — while the OS still shows 20–30% remaining. The phone shuts off to protect the cell, not because the cell is failing. Run the recalibration cycle described above: one full discharge to shutdown, then a continuous charge to 100%. After that cycle, the OS percentage and actual cell voltage align properly.