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Old 07-01-2011, 06:46 PM
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bmw_n00b13 bmw_n00b13 is offline
Freude am Fahren
Location: Cambridge, ON
 
Join Date: Feb 2008
Posts: 6,372
Mein Auto: 99 528iA
You need a smart charger that can float the battery once it reaches full charge. A trickle charger does not do this. Battery Tender brand are cheap and they're what BMW rebrands. My friend has a Schumacher INC 700a that has a wide variety of features, and he's very happy with it. Obviously that's in a different price range, but it exceeds BMW's specifications for an in house charger.
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'99 528i ('98/12 build). 174,000km BY29428/Royalrot
Breaking My Wallet since 2009
Mods: Stoptech SS brake hose, 280piece toolkit resting on trunk floor, Beisan VANOS seals
'99 540i (grandfather's)

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