Powerbank in the market will go into sleep when device under charging
is fully charged. There is no way to activate the powerbank to charge
out again even when the device needs power, unless you press the
power key on the powerbank. This makes continuous power supply
to the device impossible.
The ZA1 powerbank re-activator is designed to wake up the powerbank
every 2 hours, to keep it to continuously charge out.
Dimension: 7.5 x 5 x 1.9cm (3" x 2" x 0.75")
Input: 3 x AA Battery
Operation time: 15 days for 400mAh dry cell battery