Gap Factory takes 50% to 75% off almost everything sitewide. Plus, cut an extra 15% off via coupon code "FLURRY". Shipping adds $7, although orders of $50 or more bag free shipping. Some exclusions may apply. Deal ends December 21.
Note: Today (December 19) is the last to place orders of $50 or more with free shipping to guarantee delivery by Christmas. Otherwise, you'll need to pay extra for 2-day shipping or 1-day (and by 12/20 and 12/21 at 3 pm ET respectively).
You very likely are putting your laptop battery into an early grave.