Feeling sluggish after headlight replace

Hi
I replaced the headlight unit on my k11 2001 micra this evening, and once the new units were put in, I took it for a spin and it felt sluggish. To detail what I did, the headlights were removed, along with the battery, and the battery tray to access a bolt. These were all put back in, and I can’t imagine any of these being installed would cause the issue. Hope anyone can give any help, thanks in advance.
 
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