First of all, I apologize if this is asked already. I just couldn't find this information from my search. I have an external charger that uses 4 AA batteries in series, and I just got some li-ion batteries that are 3.6V each at 900mAh. If I put these batteries in this charger, it'll give 14.4V total. Is this going to be okay for my 2nd gen iPod Touch?