We couldn't just NOT remove the battery. It felt strange. So yes, we added the battery and then removed it. It was glorious.

The 3.8 V, 1800 mAh Lithium-ion battery allows for up to 10 hours of talk time on 3G with up to 13 days of standby time.

If you're wondering how the BlackBerry Z10 stacks up to its competitors, wonder no more:

Nexus 4: 3.8 V, 2100 mAh battery with over 10 hours of talk time.

iPhone 5: 3.8 V, 1440 mAh with up to 8 hours of talk time on 3G.