Google Nest Protect – Battery 3 Pack $230.30 Ymmv @ Target

Looks like this might be a sale this week as many stores are popping up at 30% making these around $76.76 each. Online is still showing full price so most likely in store only. Ymmv
Note: These have previously been posted as a ymmv at lower prices so you might luck out and your store might have it for lower.
Target (reference)
Brickseek