One-Day Deal Alert: iPhone 4/4S Battery Case – $19.99 at

Are all of today’s headlines about wireless charging and bigger, more difficult-to-manufacture next-generation iPhone batteries making you wish your 4 or 4S could manage a few more hours without having to be plugged in? For one day only, has you covered with a uNu iPhone 4/4S Battery Case that’s had its price slashed in half to be yours for just one Jackson (for those unfamiliar with which President’s on which bill, that’s a solid $20 – or specifically, $19.99).

Available in your choice of a trendy glossy white or a more conventional matte black, uNu claims that the 1700mAh of power will just about double your iPhone usage time. While being a protective case doubling as a charger sporting a built-in battery, it also practically doubles the thickness of your phone; although that is not as noticeably significant as that may sound.

Featuring a design suspiciously reminiscent of the Lenmar iBatteryCase we reviewed, this certainly appears that it may be a re-branding of the Lenmar solution we had originally loved. In fact, the iBatteryCase was promoted up for use as our go-to battery case ever since.

Purchasing from does come with one caveat since shipping is an additional $5. (Also, that $5 covers anything else you buy on for the day and is also a one-time cost no matter how many uNu cases you decide to buy). However that total still brings the uNu to a price that’s a few dollars less than any comparable battery case we could find on Google Shopping.

17 hours are left for you to snag a quality iPhone battery case for a $20-$25 price point in Woot’s deal of the day. Oh, and don’t forget to read Woot’s comically clever description.