[member47]

Just ordered a pair of these instead. Appear to have better reviews, bigger, and supposedly stick on better.

https://www.amazon.com/Vibrating-Rotating-Full-Cover-Stimulation-Wireless/dp/B09T6L9Y9D/ref=sr_1_18

You were right, they're a much better fit, and they provide great nipple stimulation. The clear silicon caps for the vibrator head deteriorate quickly, but the stimulation is bettter without them anyway.  I used mine several times a day, but they only lasted a few months. 

Has anyone found a corded or durable battery powered stimulator or vibrator with multiple vibration settings that works well on nipples?

I bought something similar a while back, it's basically two small bullet vibrators with one controller. Initially I bought them with the idea of stimulating breasts in mind, but in reality they only made my rib cage vibrate a little, so I got rid of the breast domes and now use the vibrators on nipples/crotch. But really any vibrator would work.