Battery has no impact on Apple's trade in values as long as it holds a charge at all which it should even well below 80%.Basically batter service recommended = huge drop in trade in value.
Ahh thanks for the update.
I've had my MBP 14 Max now since 2021 now - I'm eyeing up a M4 Pro upgrade - the prices for the M4 Max's here in Japan are scandalously expensive.
I was just worried it was suddenly gonna drop below 80% and give a service recommended warning at point of trade in. Basically batter service recommended = huge drop in trade in value.