1 If you add music and files to your iPod while you are charging the battery, it will take longer for it to charge. 2  Before using your iPod nano for the first time, it is important that you let it charge for a minimum of three hours. 3  If you do not, you can weaken the battery, giving it a shorter lifespan.
Too much iron will usually turn the blood black. However, if there is liver failure, and it's seeping into the blood stream that too can cause the blood to turn black as it becomes over loaded with toxins. Put simply it's the blood is overloaded with toxins and other nutrients that the body can't process entirely.
It will cause black urine (or dark red urine). Why does it turn your urine black? Blackwater fever can come about when when your blood cells are being destroyed at a rapid pace, and hemoglobins, which are usually inside the blood cells, are being released directly into your bloodstream and then into your urine.