Does the iPower 600i power pack charge the iPhone 4s?
The iPower 600i power pack is compatible with the iPhone 4s, as well as iPhone 4.

How does iPower 600i for iPhone 4/4S work?
You can use iPower 600i to charge your iPhone 4/4s. When powering iPhone 4/4s, iPower 600i will bypass the iPhone battery to power a connected iPhone 4 or iPhone 4s, thus extending the overall life of the iPhone 4 or iPhone 4s battery. The iPower 600i battery will not charge iPhone 4 or iPhone 4s unless connected to an external power source.

iPower 600i is charged in two ways: by connecting to a USB power adapter, or to a USB port on a computer. The included USB cable is used to charge the device. If you are using an iPhone 4/4s-compliant USB power adapter, you also may charge your iPhone 4 or iPhone 4s at the same time by inserting the iPhone 4 or iPhone 4s in the battery case while connected to an external power source.

What are the benefits of switching the iPower 600i to stand-by mode while attached to the iPhone?
Using the stand-by switch will give you even more total battery life, as the iPhone uses additional power to be on a constant charge.

What are the best methods for charging your iPower 600i?
Connect the iPower 600i to a power source using the USB cable that came with your iPower 600i. The USB cable can be plugged in to your computer or any "works with iPhone" wall-plug-style power source with USB out. You can either charge the iPower 600i with the iPhone inserted or charge them separately.

How many charge cycles do you get in the iPower 600i for iPhone?
The iPower 600i is rechargeable for over 500 cycles. (That's full cycles; partial cycles don't count as full. So, you can charge your iPower 600i 10% of the way 10 times before it counts as a complete cycle.) Don't be afraid to top it off! It's only after 500 full cycles that its fully charged capacity will be less than 75% of the capacity when it's new.

Does the iPower 600i interfere with antenna reception?
Not a chance.

Will I always receive double the battery life with my iPower 600i?
We cannot guarantee that you will receive double the battery life. The amount of additional battery you will receive depends on a variety of factors, which are different for every user.

How long does it take to charge myPower for iPhone 4?
An empty iPower 600i will charge in about 3 hours using an iPhone 4/4s-compliant power adapter. Both empty batteries can be charged in about 6 hours.

Can I sync my iPhone 4 or iPhone 4S without removing it from iPower 600i?
Yes, you can sync your iPhone 4 or iPhone 4s while in the battery case using the included micro USB cable.

How will I know how much power is left in the battery?
When your iPhone 4 or iPhone 4s is docked into the battery case, the battery level indicator on the bottom of iPower 600i will indicate the remaining capacity of the external battery.

How long is the iPower 600i warranty?
iPower 600i comes with a one-year limited warranty.

Why my power pack isn't charging?
If both the iPhone battery and the iPower 600i power pack battery are dead or very low, they may not charge simultaneously if the iPhone is inserted in the iPower 600i. iPhone battery will be prior to be charged. Only when iPhone battery finished charge. Power pack can be charged.