The answers to your questions are no, no and yes.  Never discharge a lithium battery completely or nearly so. Just charge it and use it normally. It IS a good idea to charge it to a set percentage (70% works) and have the charge cut off after that -- in other words, it should not be run on AC power, constantly charging to 100%. As for the rest, it's standard in the industry to warrant batteries for one year, regardless of any extended system warranty.  On some business systems, a separate 3-year battery warranty can be purchased.  
Hello everybody, I am going to install a new battery on Dell G5 5590, the new battery should be already pre-charged. Does anyone have some suggestion on how to properly manage a new battery? I know that there are a lots of hoaxes on the topic, so I was wandering what is the "real" way: - shall I first discharge completely the battery and then make a "long first recharge" (e.g. half day) ? - shall I first discharge completely the battery and then make a normal recharge ?  - shall I don't care about discharging the battery, just install it and work with the charger attached as I normally do? - other ways ? Thank you in advance for your replies. I also would like to spent 2 words about Dell Hardware "Premium" warranty: it doesn't cover the battery replacement,  since battery is considered a consumable item. This is not clearly stated in evidence on the recap of what the warranty covers, it is just mentioned in a tiny article in the contract. I think this is a lack of transparency, and I am unpleasantly surprised that even a company like Dell uses these kind of tricks with their customers. Just for the community to be aware.
Proper manage new battery