Add 3100mAh of battery life to your iPhone 6/s with this MFi Apple-certified case: $21 (Reg. $43)

1byone via Amazon offers its iPhone 6/s 3100mAh MFi Apple-Certified battery case in black or white with seven different colored frames for $42.99. Applying coupon code PAW7JLYD drops the final price to $20.99 with free shipping for Prime members (free trial) or on orders of $35+. This is a savings of over 50% off the regular price and the lowest current offering we can find.

This iPhone 6/s battery case add an additional 100% charge to your device. It has a 360-degree design with interchangeable bumpers for a personalized look. No worries though, the colored bumpers aren’t required if you want a classic design. Plus, it’s MFi Apple-Certified so you know it’s safe to use with your device. 1byone includes a microUSB charging cable, headphone extension adapter plus a 18-month warranty with purchase. Rated 4.8/5 stars.