Battering power sources, part II

Today, while having breakfast at a subway station, I stumbled upon a weird case of the laptop’s battery going crazy again.

As you know, Bluecore’s battery basically dropped dead after an unfortunate accident with charging cycles, but now the outlook has slightly improved after its capacity increased as a consequence of booting the laptop on battery power this morning.

$ acpitool -B
  Battery #1     : present
    Remaining capacity : 1504 mAh, 66.20%
    Design capacity    : 9000 mAh
    Last full capacity : 2272 mAh, 25.24% of design capacity
    Capacity loss      : 74.76%
    Present rate       : unknown
    Charging state     : charging
    Battery type       : rechargeable
    Model number       : 25 mAh
    Serial number      : Primary

(The last two information fields and the design capacity are bogus as usual.)

The BIOS didn’t warn me about charge capacity this time either, nor after plugging the AC adapter in at the university’s central library, so there’s something clearly odd about this. I didn’t wait for the battery to discharge at the subway and left it at 66% before proceeding to charge it again now, so let’s see how this goes in the future. I might be able to squeeze some life out of this deteriorated power source before sending off Bluecore for maintenance and repair.

Hardware