I was excited to find the Zagg Sparq2, as I carry around a lot of electronics gear (iPad, iPod, Droid phone, etc), and spend a lot of times on planes or in airports. A single device that could act as both a charger and a reserve battery sounded great. $99 (at Zagg's website) is a lot of money, but if it cut down on multiple chargers and batteries...
Unfortunately, this was one of those "too good to be true" things. My first Zagg Sparq2 arrived with evidence of shoddy workmanship: USB sockets were crooked and a bit wiggly. It held a charge and recharged my gear, but within 3 weeks, the prongs of the plug broke loose and began swinging freely.
After a bit of confusion, Zagg agreed to replace the unit, which arrived within about 7 days. It had the same slightly crooked USB sockets, which made me nervous, but it functioned fine. Unfortunately, after three weeks, the unit stopped accepting a charge. Once drained, it would not charge again. Both times the Zagg Sparq2 failed, I was on the road with no easy way to charge my phone, IPad, or iPod... muy inconvenient.
Another flurry of emails to Zagg, this time asking for refund my $100. (Screw me twice, shame on me, right?) Zagg's ever-friendly customer service folks informed me that they are happy to give me a store credit, but will NOT refund my money, because it has been more than 45 days since the original purchase! Nothing seems to budge them from this position, so I'm stuck with a credit for a store I would not buy from again, or a useless plastic paperweight.
Don't make my mistake! Stay away from the Zagg Sparq2 until they get their production and quality control issues under control, and adopt better return policies for the lemons they seem to be producing.