iPhone panic Gas Gauge, TG0V, TB0V: Battery / battery communication

Panic codes: Gas Gauge, TG0V, TB0V, TG0B, 0x4000, 0x500000, 0xa1

How to fix it

The phone cannot talk to the battery (battery communication).

1. Try a known-good original battery.

2. Check the battery connector on the board.

3. If a battery tag-on flex is used, check its soldering.

By Hasan Patel, iPhone Fixer. Check your own panic