I purchased this Solar Charger to keep my BlueAnt Bluetooth handsfree permanently charged. I checked the Standby current and the Active current specs; this device should have been perfect. Wrong!!!
If left on permanently attached to the Bluetooth device, it runs down in one night. If you allow it to recharge from the Sun only, it will never do so. It must be again fully charged from a USB port, then attached to the device. The device must be switched on and off whenever I enter or exit the vehicle. Waste of money as I can just recharge the Bluetooth device with USB and use it for three days between charges. Also the suction caps keep falling off the windscreen. If anyone wants mine they can have for postage. Not even worth half the price as it is a frustrating piece of equipment. Sorry, but that is my finding!