This powerful little battery pack is very flexible, it can act as a 5 volt battery or a 19 volt battery with 6 steps in between. Outputs at 5V, 6V, 7.5V, 9V, 12V, 14V, 16V and 19V. It can also be charged with voltages as low as 5 volts and as high as 24VDC.
This battery pack consists of a 44 watt hour lithium ion battery assembly and three DC/DC converters. The first DC converter allows the pack to be charged with a wide range of voltage inputs. The second allows the pack to deliver a user settable voltage to run equipment requiring 5volts to 19+volts. The third DC converter supplies a steady 5 volts to a USB port for charging cell phones, Ipods, and other USB charged equipment. All this is built into the sleek black battery case.
For example, when used with your cell-phone car charger attached the PST-MP3500 can run a typical cell phone for 15 times longer than the battery in the phone, or charge the phone 10-15 times. You can double the battery time for a laptop computer, or use a digital camera up to 20 times as long as when using disposable AA alkalines.