No, the Canon EOS 550D records at a maximum resolution of Full HD (1920 x 1080) at 30, 25, or 24 frames per second.
The Canon 550D uses the LP-E8 battery, providing approximately 440 shots per full charge according to CIPA standards.
Yes, the Canon 550D features an EF-S mount, which is fully compatible with both Canon EF (Full Frame) and EF-S (APS-C) lenses.
With an ISO range up to 6400 (expandable to 12800), it performs well for its class, though noise is visible at higher sensitivities compared to modern mirrorless cameras.