Battery Flex Cable (SMBus / Battery Communication Cable) for MacBook Pro (Models A2159, A1708, A2338)

Genuine-spec battery flex cable for MacBook Pro models A2159 (16", 2019), A1708 (13", 2016–2017), and A2338 (13", 2020 M1)—restores critical communication between the battery and logic board for proper power-on, charging, and macOS battery status.
Genuine-spec battery flex cable for MacBook Pro models A2159 (16″, 2019), A1708 (13″, 2016–2017), and A2338 (13″, 2020 M1)—restores critical communication between the battery and logic board for proper power-on, charging, and macOS battery status.
Carries SMBus (System Management Bus) signals from the battery to the logic board
Enables: Accurate battery percentage and health reporting in macOS Proper charging control (start/stop, thermal throttling) Power-on capability (MacBooks will not boot without this connection) Prevention of “Battery Not Charging” or “Service Battery” errors
Accurate battery percentage and health reporting in macOS
Proper charging control (start/stop, thermal throttling)
Power-on capability (MacBooks will not boot without this connection)
Prevention of “Battery Not Charging” or “Service Battery” errors
MacBook won’t turn on (even with a good battery)
Battery shows “–%”, 0%, or “Not Charging”
Random shutdowns under load
macOS displays “No Battery Available”
Logic board powers fans or lights but no display output
Battery flex cable only (with OEM-style connector and strain relief)
❌ Does not include: battery, logic board, or trackpad
Requires full bottom case removal and battery disconnection
Connects via a ZIF or press-fit socket on the logic board
Must be routed precisely to avoid tension or micro-tears
Highly recommended for experienced or certified technicians—improper installation can cause permanent power or battery communication failure