Highscreen Omega Prime XL B2800 Replacement Battery 3.7V 2600mAh

Highscreen Omega Prime XL — 3.7V Li-ion Replacement Battery (B2800)

The B2800 is a 3.7V, 2600mAh lithium-ion cell for the Highscreen Omega Prime XL smartphone. It replaces the original battery when capacity fade or charge failure makes the phone unreliable. Voltage and capacity match the OEM specification exactly.

• Omega Prime XL fit: The Omega Prime XL uses a single-cell 3.7V nominal architecture with a connector and BMS handshake specific to this chassis. The B2800 matches that connector pinout and voltage rail — no adapter or modification needed.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the Omega Prime XL platform. The BMS accepted the cell on first connection, completed a full charge cycle without interrupt, and reported state-of-charge correctly after one conditioning cycle.
• 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 recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell.

Sudden shutdown at 20–30% on the Omega Prime XL after a cell swap

The Omega Prime XL's fuel gauge IC holds a discharge curve learned from the original cell. A new cell has a different internal resistance profile, so the IC miscalculates the voltage cliff — the point where cell voltage collapses under modem or screen load. The phone cuts power before the display percentage reaches zero. One full discharge-to-shutdown followed by an uninterrupted full charge resets the coulomb counter and brings percentage reporting back in line with actual cell state.

Phone won't power on after the replacement cell sat in storage

Li-ion cells self-discharge during storage. If the B2800 has been stored for several months, the cell voltage may have dropped below 2.5V — the threshold where the BMS enters lockout to prevent damage. The phone will not respond to a short press of the power button in this state. Connect the phone to a low-current charger and leave it for 20–30 minutes before attempting to power on; the charge IC will trickle current into the cell until voltage clears the BMS recovery threshold, typically around 3.0V.