I have a browser based app running on a Nexus 10 tablet with a barcode scanner attached to the USB, the device is being charged by the pogo pin charger. However I am finding that the battery is still draining at around 10% per hour even when charging. I have tried using a powered USB but this does not seem to be having much effect, and also tried optimising all the settings i.e turning everything but the WIFI off Does anyone else have any ideas?