Groupon has the UNU Superpack 10,000mAh Rechargeable Battery Pack with MFi Cable on sale for $34.99 + FREE shipping!

Why this deal is hot:
Save 42% off -- that's $25.00 in savings!

What this does and why you need it:
This rechargeable battery pack features a cable with a micro-USB and MFi-certified Apple Lightning adapters. It is compatible with multiple devices, including the iPhone 6 and Note4. It features a 2.4A charging input for fast charging, measures 4.5" x 1.25" x 6.0" and weighs just 0.75 pounds making it perfect for on the go!