Sonstige Equinux tizi Mobile TV Replacement Battery 3.7V 750mAh

Sonstige Equinux tizi Mobile TV — 3.7V Li-ion Replacement Battery

This is a 3.7V, 750mAh (2.78Wh) Li-ion cell for the Equinux tizi Mobile TV portable digital television receiver. The tizi is a compact DVB-T tuner that streams live TV to a connected device, and this battery is the only power source keeping that tuner alive. Dimensions are 53.00 × 33.90 × 5.70mm — measure your existing cell before ordering.

• tizi Mobile TV platform fit: The tizi runs its DVB-T tuner, Wi-Fi broadcast stack, and onboard processor from a single small Li-ion cell at 3.7V nominal. Any cell in this unit must match that voltage rail exactly — deviation causes the tuner firmware to shut down the RF front end before the battery protection circuit even trips.
• Bench tested on actual hardware: We cycled this cell through full charge and load discharge on a Li-ion analyser, confirming the BMS protection trip points at the cell voltage floor and verifying capacity against the rated 750mAh. The cell held within acceptable tolerance across multiple cycles before leaving the bench.
• Fuel gauge recalibration on first use: On first use after fitting, run one complete discharge down to auto-shutoff, then charge uninterrupted to 100%. The tizi's fuel gauge IC was calibrated to the original cell's discharge curve — skipping this step causes the percentage readout to jump or report full when the cell is already low.

Why the tizi cuts the Wi-Fi stream mid-session at moderate battery levels

The tizi broadcasts a live DVB-T stream over its own Wi-Fi network, which pulls simultaneous current from the tuner RF stage and the Wi-Fi transmitter. When a degraded or freshly fitted uncalibrated cell cannot sustain voltage under that combined draw, the internal voltage drops below the BMS protection threshold — even if the displayed percentage looks acceptable. The firmware interprets this voltage sag as a low-cell condition and drops the Wi-Fi radio first, cutting the stream. After fitting a new cell, complete one full discharge-charge cycle so the fuel gauge IC maps the actual voltage-to-capacity curve of the replacement cell before heavy use.

tizi shows incorrect battery percentage after cell replacement

The tizi's fuel gauge IC stores a learned discharge curve from the original cell — it does not automatically reset when a new cell is installed. With a fresh cell, the IC is reading voltage and making capacity estimates against the wrong reference, so the percentage display can read high, jump suddenly, or drop to zero before the cell is actually depleted. The fix is a single full conditioning cycle: discharge the tizi to automatic shutoff under normal use, then charge continuously to 100% without interruption. After that cycle the coulomb counter reanchors to the new cell's actual curve and the percentage readout stabilises.