Ive just got one of these new type jump starters, its charged up ok etc, says its at 99%, now i was gonna go round to a mates cos he has a flat battery, just decided to measure the voltage on the croc leads for this, and its nearly 17v

is this gonna cause damage on someones car? is this thing faulty, i just put a car bulb on it while still measuring, and it didnt drop a milli volt or anything..

hmmmmm, used to have the old bigger chunky heavy types and that was around 12.7v ish...

this was from amazon, reduced from £170 to £43, i did use a 20 quid amazon voucher, so it only stands me at £23....

do you think its cak?