1. How long does one charge last?
2. How long does it take to charge?
6-8 hours to fully charge.
3. How do you charge it? Is it portable?
There is a charger that looks similar to a laptop charger. Yes it is portable.
4. How many charge cycles does it have?
500 to 1000 cycles depending on depth of discharge
One year warranty on Battery pack (excludes batteries).