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.
There is also a chance that your black period blood is caused by an infection or STD. Uterus infections can cause blackening as well as many STDs. Women that have sex during their cycle also experience black bleeding because the blood was pushed back into the vagina and can become trapped as a result.
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.