I ve used it to pump out my PS fluid, Coolant and Trans Fluid so far. If you have the slightest bit of doubt in your mechanical abilities or experience, by all means, leave repairs directly affecting your and your loved ones' safety to a trained mechanic. It's a good idea to have the charging system tested once a year or when any problem arises. It's not a good idea to have your alternator charge a dead or weak battery. When buying a new battery, have it fully charged before installing it.
Many people presume a new battery comes fully charged.
If you are performance minded, get the largest battery with the most cranking amps that will fit your car. Clean your terminals and battery tray once a year, and when installing a new battery, to remove any deposits. It's also a good idea to install those terminal felts at the same time. These measures will help to extend the life of your electrical componates as well as your alternator system. All electronics suffer if current or voltage levels are compromised.