BASF, the German chemicals conglomerate, said last week that it would pursue a stronger position in the lithium-ion battery space by commercializing higher-quality electrolyte formulas.

FORBES: Chemicals Giant Gambles on Li-ion Batteries

The micro-SIM card is found under here, too, but its position next to the 1, 800mAh battery pack necessarily means you won't be swapping that out without shutting things down.

ENGADGET: BlackBerry Z10 review Mobile

In your humble narrator's position, waiting a few months for a Haswell device, which promises significantly increased battery life might be a wise choice.

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