with reference to the drawing figures , an embodiment of the present invention for universal adapter apparatus for charging and / or powering portable electronic devices provides an adapter apparatus 10 comprising at least one conductive block 12 sized to rotate upon and releasably attach to an external power source 500 having an cathode post 530 and at least one anode post 520 . the conductive block 12 comprises a top side , a bottom side , first and second latitudinal sides , and first and second longitudinal sides . the adapter further comprises alignment means whereby the external power source cathode post 530 is self centered within the conductive block after attachment thereto . the conductive block further comprises a central axis of rotation . the alignment means comprises a first annular aperture 14 and a second annular aperture 18 centered on the conductive block 12 central axis thereby defining a conductive block interior surface 16 contact point . the first annular aperture 14 has a larger diameter than the second annular aperture 18 . the second annular aperture 18 is on the block bottom side . the adapter also comprises attachment means whereby the conductive block is positioned onto at least one anode post 520 of the external power source 500 . the adapter apparatus further comprises locking means whereby the conductive block 12 is locked into place on at least one anode post 520 of the external power source 500 . connecting means whereby the adapter is connected to at least one portable electronic device completes the adapter apparatus of an embodiment of the present invention . the attachment means and locking means comprise two arcuate channels , 22 and 24 , of equal length on the block bottom side , each channel having a first and second end . each channel is sized to engage and receive one anode post . one channel has an open first end 22 a flush with one block longitudinal side . the other channel has an open first end 24 a flush with the other block longitudinal side . each channel has closed second ends , 22 b and 24 b , defining a diameter sufficient to receive and lock onto a anode post 520 as an anode contact point . both closed channel second end contact points communicate with the conductive block interior surface anode contact point . in this manner , the anode posts 520 are positioned at the channel open first ends and received and locked into the channel closed second ends by rotation of the conductive block 12 about the conducive block central axis , fig8 , onto a locking position on the power supply 500 . the positioned and locked conductive block 12 as disclosed is aligned with the power supply 500 body , fig9 . the connecting means comprises a cable 706 with a plug end 710 comprising a central cathode contact and periphery anode contacts and an adapter end . the conductive block first annular aperture 14 is sized to receive and engage the plug end 710 and align the plug end central cathode contact with the external power source cathode 530 so that these parts contact . the plug end 710 central cathode communicates with the external power source cathode 530 through the conductive block second annular aperture 18 . the periphery plug end 710 anode contacts communicate with the conductive block interior surface 16 contact point once the block has been locked onto the anode posts 520 of the external power source 500 , and the plug end has been inserted into the first annular aperture 14 . the plug end 710 central anode contact is insulated from the periphery cathode contacts . the external power supply 500 source comprises a direct current source 505 , housed within a cover 510 . power supply battery cell voltage combined with embodiments of the present invention can be scaled to deliver from 0 . 25 volts to 24 volts for extended use or charge time . most portable electronic devices employ a control circuit incorporated in the device . this control circuit only begins to charge the device &# 39 ; s rechargeable battery or operate the device if the voltage from the emergency charge apparatus is above a pre - set lower threshold . many portable electronic devices , such as cellular telephones , set this lower threshold at 3 . 6 volts . other devices set the control circuit limit higher , at about 9 volts . voltage in excess of the electronic device &# 39 ; s control circuit lower threshold can operate the device while the device &# 39 ; s battery is being recharged . thus , a 0 . 25 volt - 24 volt range of power supply battery cell voltage when attached to embodiments of the present invention will simultaneously operate and re - charge the device battery for most portable electronic devices presently sold . in yet another embodiment of the present invention , the conductive block further comprises non - conductive exterior surfaces including , but not limited to , materials selected from the group consisting of wood , epoxy , resin , acrylic , plastic composites , cellulose , laminates including metal laminates , painted or injection molded ( filled ) materials , polycarbonate , and polystyrene . all contact points within the conductive block ( 22 b , 24 b , and 16 ) are constructed from any suitable conductive metal including , but not limited to , materials selected from the group consisting of silver , aluminum , copper , and steel alloy . the preferred embodiment of the present invention comprises contact points within the conductive block ( 22 b , 24 b , and 16 ) made of aluminum . as to the manner of usage and operation of the adapter , and the means of electrical power necessary to drive the present invention , the same should be apparent from the above description and the art . accordingly , no further discussion relating to the manner of usage , operation , or direct current means to power the present invention will be provided . although the invention has been described in some detail with reference to the preferred embodiment and alternatives , those of skill in the art will realize , in light of the teachings herein , that certain changes and modifications can be made without departing from the spirit and scope of the invention . accordingly , the invention is limited only by the claims of any subsequent united states non - provisional or foreign patent application .