Aha, they've started another round of the points-back-in-installments stuff, which applies to that item and other power tool batteries. This time it's 3 monthly installments, each good for 30 days, which isn't much risk.
Plus it seems to be stacking with the $30 back on $75+ OOP deal that's still running, where you get the points right away and they last for 30 days. So buying the $100 battery all OOP, you'd get ~$47 back to use in June, ~$17 to use in July, and ~$17 to use in August.
http://www.sears.com/craftsman-c3-19.2-volt-xcp-high-capacity-lithium/p-00935702000P
" Online only. Get 50% CASHBACK in points in 3 installments on this item sold by Sears
Expires on 06/02/2018
Members get 50% CASHBACK in points in 3 installments on Craftsman Batteries up to $100 in points on a qualifying Battery. Members get 50% CASHBACK in points in total over 3 months on qualifying items at Sears from 5/28 – 6/2. 16.3% in points valid through 6/29. Max 2 times and $100 in points per member. Valid through June 02, 2018 11:59 PM CDT. Points valid 30 days. Points earned will be added to your Shop Your Way account and can be used on your next purchase. Only Shop Your Way members are eligible to earn or redeem points. Expiration dates vary. Offer Valid for Shop Your Way members only. Must be a Shop Your Way member logged in at Sears.com to receive this special offer. By accepting Shop Your Way member benefits and offers, you agree to the Shop Your Way terms and conditions, available at
www.shopyourway.com/terms. Excludes Clearance, Great Price and Unilateral Pricing Policy items. Also excludes DeWalt brand tools. "