The PowerBar 4200 embodies the latest in ultra-thin lithium polymer technology, matched with advanced charge control circuits. It is the lightest, slimmest charger available for smart phones. Despite its slim profile, it has awesome power for emergencies, 4200 mAh - typically more than twice the battery capacity of your smart phone. The advanced electronics built into the 4200 enables it to recognize the power needs of your device. The 4200 embodies over-charging, over-discharging, over-current and short circuit protection.
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Posted by John C. on 19th Mar 2013
Mine arrived not charged. Charged it overnight and took it to work. I knew my Ipad was very low so I was going to use that as my test. When I got to work my on call tech came in with a dead battery on her phone. It charged her to about 90 percent in 3 hours but she was using it while being charged. It used 1 bar. Plugged it into my Ipad and forgot about it. Found the fat cat fully discharged and the Ipad fully charged. I think this is going to work out great. As a side note...my call tech got the information to order hers!
Posted by Angela Bruskotter on 28th Aug 2012
The device came charged and ready to go. I've only had to use it once but so far it kept the charge and worked well with my iphone. It charged it and allowed me to use the phone while it was charging. I'm an artist and use my phone to process payments when I'm at a show. I usually don't have electricity to charge my phone so by the end of the day, the battery on my phone is getting low. Without the charger I run the risk of having no way to take payments for my artwork. This gives me peace of mind that my phone will remain charged no matter how long the day goes.