Daily Steals has the Lenmar ChugPlug Battery Pack for MacBook Air and MacBook Pro for $25 shipped. That’s $105 under the original listing, $32 better than Amazon, almost half our previous mention and the best we can find.
Lenmar’s ChugPlug adds up to 4 additional hours of battery life to your 11-inch MacBook Air and up to 3 hours to the 13-inch MacBook Air/Pro. While you won’t get a full charge out of this thing, it will give you ample juice until you can. Note: not compatible with 15-inch MacBooks. The ChugPlug was among our top picks for the best portable battery options for MacBooks.
While reviews are somewhat split at 3.4/5 stars, nearly 60% of reviewers gave it a 5 star nod. It ships with a 30 day warranty.