My other Zaggsparq 2.0 has been shelved after a full 9 hour charge, and after about a week it is now down to 3 LED's. So if the Sparq loses 1% per day, as ZAGG claims, then this Sparq should be down 7% and have a total charge of 93%. This means 3 LED's equals 75 to 99% of charge left and appears to be doing as expected.
Can't say I am still to pleased with how quickly the Zaggsparq 2.0 loses a charge. With those numbers you would rarely ever get 4 full iPhone charges out of the device. And considering it takes 9 full hours to recharge the Sparq, it's not something you can just top off before leaving on a trip. Probably works better for iPhone half charges.