Initial impression on the battery charger (IMP52D, iTorch external battery): The plastic casing is thick and sturdy. It seems pretty solid and well crafted. I found the manual useful. It was also helpful to have the extra cord and case. I was able to get three full charges for my Sansa Fuze mp3 player before I had to recharge the battery. I used my new Trent wall charger to charge the battery and all worked well (nothing felt warm). A side note, you could label the ports on the wall charger.