Quote:
Originally Posted by jcatral14
With the batteries that our M35i cars have, can I still use any generic battery tender or trickle charger or do I need something with specific power/amperage?
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The stock battery is an AGM type, which requires a slightly higher charging voltage (~ +0.1V) from conventional ones. So, I would not recommend a generic cheapo - need to make sure it supports AGM well.
Regarding power, it depends. The car will certainly draw a significant current when initially hooking it up, because of the designed-in charging parameters. However, the battery will charge just fine at lower power, if given time.
Net-net, an AGM-specific maintenance charger of pretty much any power rating will work as a tender. CTek makes an excellent line, if somewhat pricey for the features you get.