eBay

Restore your foldable’s power efficiency and system stability with the factory-authentic secondary power cell.

This is a Genuine OEM (Original Equipment Manufacturer) Upper (Secondary) Battery, professionally harvested from a working Samsung Galaxy Z Flip 6 (Model SM-F741U / SM-F741U1).

The Galaxy Z Flip 6 architecture utilizes a dual-battery design to distribute weight and optimize space within the folding chassis. While the lower battery handles the bulk of the capacity, this Upper Secondary Battery is crucial for balancing the load and powering the top half of the device, including the Cover Screen and the 50MP Camera system. Using an original Samsung pull ensures that the sophisticated power-management IC correctly syncs both cells, preventing the "unbalanced drain" and overheating issues common with generic replacements.

Key Features

Dual-Cell Sync Technology: Engineered to work in perfect harmony with the main battery for a combined $4000mAh$ typical capacity.
Samsung proprietary Control IC: Features the original fuel gauge chip for 100% accurate battery percentage reporting and "Battery Health" diagnostics.
Super Fast Charging Support: Optimized for Samsung’s 25W wired and 15W wireless charging curves.
Precision Foldable Fit: Designed with the exact slim-profile dimensions required to fit behind the Cover Screen without obstructing the hinge or display flex.
Original Gold-Plated Connector: Ensures a high-conductivity, low-heat connection to the upper portion of the logic board.
Tested & Verified: Professionally bench-tested for voltage stability, peak discharge, and cycle integrity.

Symptoms This Part Fixes

Sudden Power Drops: The phone shows 40% and then immediately drops to 5% or shuts off (often a sign of an unbalanced dual-battery system).
Upper-Half Overheating: The area around the Cover Screen and Cameras becomes excessively hot during use or charging.
Boot Loops: The device restarts repeatedly at the Samsung logo because the secondary cell can no longer provide the "surge" power needed for startup.
Inaccurate Battery Percentage: The battery icon "jumps" up and down unexpectedly.
Cover Screen Glitches: Fixes power-related flickering on the external display caused by a failing secondary cell.

Technical Specifications

Feature	Detail
Compatible Model	Galaxy Z Flip 6 (SM-F741 Series)
Battery Model	EB-BF742ABY (or equivalent OEM)
Rated Capacity	1130mAh (Upper/Secondary Cell)
Nominal Voltage	$3.88V$
Condition	Used Original (OEM Pull)

Installation Requirement

⚠️ PROFESSIONAL INSTALLATION REQUIRED