i really cant believe there are people out there who rate these as four stars- shockingly poor power packs. they are fine for say, the first two or three charges maybe and then you will have a product that wont hold charge from monday to tuesday- you absolutely cannot rely on these to play for any length of time. charge them in the morning, play for an hour and they won't have any charge come dinnertime. you cannot just take a notion to play your xbox cos you need to charge them first. by the time they have charged you will have found something else to do, i have lost count of the times i have done that. that and curse myself for buying this cheapo junk.
avoid this product, it really is cheap rubbish thats really not worth any money, even the price asked here.