Nyko iBoost Mini Battery Pack for iPod Mini

• Up to 10 hours extra play time
• High quality lithium-ion battery cells
• Charge and transfer files, all at the same time
• Can be charged with car charger (not included)
• Charges via AC adapter supplied with iPod, or via computer's USB or FireWire port

The other reviewer is 100% correct. The iboost when charged and left unused will only last about 2 days. Then the red starts to flash and then it is out of battery. You then have to charge it again and it will last you another 2 days if not used. But if you do use it it will last a while. Like 10 hours for 1st gen and 20 for second gen. That is if you use it immedialty after it is done charging. Warning also could cause your battery to be out of sync!!!!!!

I gave a 2 stars because I brought my Ipod to listen to school everyday. (I had a TA class where I listen to music and grade papers) So it worked for that becuase I consitinly charged the battery everyday. But if you are looking for a Battery Pack that is more realiable and is recharagable (that could replace your depleting battery) look further. This is not what you are looking for.

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I purchased a Nyko iBoost Battery Pack for an iPod mini back in December and it started failing within two months of purchase. After six months it failed to hold a charge. I notified Amazon about this and they also could not back up the product with a replacement or partial refund. Do not buy this product as there is no guarantee, either from Amazon or the manufacturer. I suggest buying an external pack (i.e. Belkin) in which the batteries are separate and can be easily charged and replaced. Chalk it up to a painful lesson learned about buying things like this from Amazon.

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I bought this bat pack around 2006 and I'm still using it to this day. With mine, if left unused, it will stay charged for a few weeks. While being used several hours a day, I get at least a week minimum use out of it.

I'm not sure why the other two reviewers had such bad luck. In fact, my iPod Mini 2G that I bought this bat pack for is still working right along with the bat pack itself and has since been passed down to one of my kids.

I'm actually considering buying one more of these as a backup to the one I have.