I'm expecting my V2 tomorrow. As this my first big-battery mod, I have a few questions.(I'm getting the full kit wich includes batteries and a charger.)1. Is it ok to leave the batteries in the charger for a long time, say 24 hours?2. Can I put partially discharged batteries in the charger to top them off or do I need to wait until they're dead?3. Are the batteries that come with the full kit "protected"?4. If not, are there "protected" batteries that can be ordered? And if so, why would I want them?Thanks in advance