Originally Posted by
pizzaguy
....
ALL computers need CLEAN, stable, filtered power. Your alternator puts out ripple-intensive DC and the battery is your main source of filtering.
(Outside of the filter networks on the module boards, the battery is the ONLY filtering you have.)
Turing off "preaching mode" now...
Now is your chance to preach.. since you don't have "charge" ports and separate "device" ports just how does the battery "filter" anything? The same wire feeding your battery is attached to the whole circuit of the car. Help stabilize the current I could buy... but filter?