Exploding laptop batteries

My second MacBook Pro has taken on an exciting new shape!

The lithium-ion goo inside which holds the power seems to have expanded dramatically, breaking the battery casing open.

My first MBP had a faulty battery, which ceased holding any charge after a month or so and was replaced (after some quibbling) as part of Apple's battery recall; the replacement battery's capacity tailed off over the next few years, eventually holding about a minute's worth of power by the time I replaced it, but never bursting its casing.

Let's hope the new unibody ones with non-replaceable batteries don't have the same problem...