Thumb Score: +16

Amazon [amazon.com] has 4-Pack Energizer 3V Lithium Coin Batteries with 3-in-1 Child Shield for $4.99 – $1 when you ‘clip’ the coupon on product page – 5% when you check out via Subscribe & Save = $3.74.
Shipping is free with Prime or on $35+ orders.

Savings
Save an extra $1 on your first Subscribe and Save order. (check and activate [amazon.com])