When I got nomad in April 2016, it included a 6-cell battery. acpi told me its “last full capacity” was 54%. Eventually that ended up at 34%.

In early 2017, I replaced it with a 9-cell battery.

Recently, nomad’s battery started behaving oddly.

Yesterday, I noticed that charging would stall at about 80%. Upon recharging it later, acpi told me its “last full capacity” was 69% (down from 87%). This morning, battery life suddenly jumped from the low 20s to 5%.

I may try reconditioning it to see what happens.