for charity? we believe, for? according to me it takes care of everything. For example, if while writing you accidentally touch the lever of the headlights you can create problems, why? those about 8 amps in absorption do to lower the voltage even slightly, or if you also lower the glass.. As I write, I remove all and leave the pc resting on the seat without even touching it until the end of the writing, and when I can ( if I'm not outside), I connect the power supply in parallel to the battery. Another thing, according to me, important ? do not leave objects in the electronic type phones that are close to the programmer, this is why? interference may occur.