Vodafone Smart Ultra 7 Compatible Battery 3.85V 2950mAh

Vodafone Smart Ultra 7 / VFD 700 — 3.85V Li-Polymer Replacement Battery (TLp029B1)

This is a 3.85V, 2950mAh Li-Polymer replacement battery for the Vodafone Smart Ultra 7 and VFD 700 smartphones. It replaces OEM part numbers TLp029B1 and TLp029B2. Swap it in when the original cell no longer holds a charge through a normal day of use.

• Smart Ultra 7 and VFD 700 compatibility: Both models share the same battery bay dimensions, connector pinout, and BMS handshake protocol — 107.10 × 45.80 × 3.60mm cell with a matched voltage rail at 3.85V nominal.
• Bench tested on actual hardware: We cycled this cell through full discharge and recharge on a VFD 700 unit. The BMS accepted the cell without fault codes, and the charge IC stepped through CC/CV phases cleanly with no thermal interruption.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging pushes current into an uncalibrated cell.

Sudden shutdown at 20–30% on the replacement cell

This is a voltage cliff issue, not a capacity fault. Under peak load — active LTE modem, screen at full brightness, GPS running — the cell voltage sags below the BMS cutoff threshold even though the fuel gauge still reads 20–30%. The fuel gauge IC was calibrated to the old cell's internal resistance curve and hasn't yet learned where the new cell's voltage floor actually sits. One full discharge-to-shutdown followed by a complete charge corrects the mapping. After that cycle, reported percentage and actual cutoff should align within a few percent.

Phone warm near the battery during the first few charges

A fresh Li-Polymer cell has higher internal impedance than a broken-in one. The charge IC delivers the same current it would to a seasoned cell, and the higher resistance converts more of that energy to heat during the first two or three cycles. This is normal and self-limiting — impedance drops as the cell forms. If the phone stays warm beyond the third full charge cycle, check that the back cover is seated correctly and not trapping heat against the cell.