A device having a rechargeable power source with an associated battery charger base having a quick charge current output and a trickle charge current output. A control circuit within the device is also provided that monitors if and for how long the device is attached to the base and determines the present...http://www.google.co.uk/patents/US5225763?utm_source=gb-gplus-sharePatent US5225763 - Battery charging circuit and method for an ambulatory feeding pump
