nah.. seems to be not that hard. 
why not using the internal power connector but running wires to the normal DC jack? do you need more than one voltage on the internal connector? (never had a battery for my 520 and never was interested in knowing how the batt. works 
) so that´s how i´d explain to myself...
why not using the internal power connector but running wires to the normal DC jack? do you need more than one voltage on the internal connector? (never had a battery for my 520 and never was interested in knowing how the batt. works ) so that´s how i´d explain to myself...