Lighter steering after battery change

[Tempz]

My steering seems to have more assist/feels lighter after replacing my battery. Could it be that my old battery was so knackered that it wasn’t powering the electric steering system properly?

 

[Mennims]

I don't think that's the case because your alternator (if working correctly) will power everything in your car when your engine is on and it'll still have plenty more power for charging the battery and running auxiliary devices etc, so your power steering will not be running off the energy in your battery.

It's likely it needs to be re-calibrated. Check this post
https://www.audi-sport.net/xf/threads/loss-of-power-steering-after-disconnecting-battery.248224/