I just received my Motorola wall charger. I was previously using a Verizon one that was compatible for the Razr Maxx (per rep.). But, I have noticed the Motorola charges at a slower rate. Probably better for the battery to charge at a slower rate anyways. It's not that slow but, I did notice it. Full charge from 20% approx. 3 hours. Is this unusual? You would think the would all charge the same.