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.
Where did the blood go? Answer. Blood blisters occur when the trauma to the skin ruptures small blood vessels, leading to a collection of blood under the skin. At first, this blood may be red in color, but as it ages and begins to be digested away by the body, it will turn dark purple or black in color. Eventually, one of two things may occur.