The micro-processor chargers are the only way to go, I've been using a Schumacher MP charger for almost 20 yrs now, haven't cooked a battery yet. The alternator check function is an added plus with the MP chargers.

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'03 X5 4.4 Sport, last of the M62s (8-03 build date)
I believe in deadication to craftmanship in a world of mediocrity!