Immersion blender: corded or cordless?
Is it worth it to spend twice as much on a cordless immersion blender as one with a cord? Is there a noticeable difference in power?
Unless it's made by Makita, I wouldn't go cordless. They aren't going to have the power, and you'll probably never be that far from an outlet anyway.
I'm a big cordless fan, up to and including a B&D cordless blender, but this isn't a good application. You'll have to leave it in the charger to be sure it is ready to use when you want it. Rechargeable batteries self discharge at a slow but significant rate. A good corded unit is ready to go in no time flat and will do a better job.
I have never used a cordless blender that was anywhere worth the money. I have never thought that a cord got in the way. It's just not that big of a nuisance.
Get a stick blender with just a on-off switch and don't get seduced by fancy attachments.
I vote for the corded - no batteries to replace and plenty of power.
I have a GE one that came with a separate food processor attachment and I love it! It was around $30
cordless appliance batteries don't last forever but an appliance with a cord last for decades.