Quote:
Originally Posted by JHZR2
smart chargers will not cause issues and are safe to use, especially if temperature-compensated. Some float chargers just put out 1A or 2A continuously, even after the battery is at full charge. This is no good, especially for a car such as BMW, which has the battery inside of the cabin.
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Thanks for your valuable advice! I have since bought a CTEK Multi XS 3600 "smart" charger and charged all three cars over the weekend - each took between 8 to 16 hours to bring up to full charge. I need to get a multimeter so I can do a quantitative analysis of my battery status. As I do not drive the 135i much now I will leave it attached to the CTEK.
Sprey - did you leave your car unlocked over that period (as I did)? Leaving the car unlocked apparently causes a drain on the battery.
