Griffin PowerDuo Reserve Wall Charger + Car Charger + Backup Battery for iPod or iPhone

• The industry's most trusted AC and 12 volt chargers
• Charges iPhone, iPod, MP3 players, other USB-chargeable devices
• Removable backup battery provides hours of additional use for iPhone and iPod
• Battery is interchangeable between PowerJolt Reserve and PowerBlock Reserve chargers
• Reserve battery packs are also sold separately

The good: The battery is small and light. The less then optimal: The battery pack does not provide much extra power. Reviews for this product (on Amazon and elsewhere) report it provides about 70-75% additional battery life. In 2 uses of this with my iPhone 4S, it only provided 15%-20% increase in battery power. The 15% was after the battery pack had sat about a week after being charged. The 20% was after the battery pack had been just removed from the charger and said it was fully charged. While I like Griffin products and generally find them to be of better than average quality, I think this product is a bit too expensive for the additional power it provides.

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Have this product for over one year and liked it enough to send it as a gift for a friend!

Read Best Reviews of Griffin PowerDuo Reserve Wall Charger + Car Charger + Backup Battery for iPod or iPhone Here

This is my third Power Duo. Love them!! First one I bought off EBay. Had the old style battery. It died within a month. This has the smaller battery. So far this one is doing great. It won't fully charge my Gen 4 Touch, but it will put it in the 70 % range. I have a RavPower RP-PB07 for a full charge. Also great item. Keeps my Touch from flashing the 20% warning constantly.Thank you Apple :( I know my battery is almost dead!! The battery itself is about the size of a Zippo lighter, It Comes with a AC charger and one for the car, both have a USB port, so you can charge your Apple device while the battery charges. If you're an Otterbox fan like me you will need a 30 pin extender for the charge port. Got the Cosmos for maybe $3, 00. Great little charger at a really great price. A+++

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This battery has been charged for hours and only provided me with 20% boost. Seems useful for trips and plus it comes with wall and car charger. Didn't pay much for it but $29.99 seems overpriced for me.

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Item was just has described. It arrived just in time for christmas. My grandson was thrilled to get it. Satisfied.