Sporting an external battery pack on your iPod Touch or iPhone? If it happens to be from Mophie or Best Buy's Rocketfish brand, we'd advise you to take note and avoid getting burned. Rocketfish's RF-KL12 battery case for the iPhone 3G / 3GS has been reported in a small number of burn and "minor" fire incidents, while Mophie's announced that a select number of Juice Pack Air models for the 4th generation iPod Touch (seen above) are at risk for overheating, and potentially even melting. Suffice it to say, if you're currently in possession of said battery extenders you should stop using it immediately. Best Buy asks that owners of the Rocketfish case get in touch to facilitate a return, which will be met with a $70 gift card in the US ($105 in Canada) as compensation. As for Mophie? If your Juice Pack Air is among the affected serial numbers, you'll be able to initiate a swap for a fresh unit via a return form on its website. Hit those source links below for all the details -- this is one case where you definitely won't want to feel the burn.