How does TekCharge MP1800 work?
TekCharge MP1800 has an internal lithium ion battery, that powers and/or charges connected devices. While TekCharge MP1800 is connected, it powers and charges the device battery, so the device can be used while its battery is being charged. TekCharge MP1800 discharges power from its battery as it powers and charges a device, so the battery eventually must be recharged.