osbornk
Old man in the mountains
I've started mine with the Battery Tender Jr. connected by accident and didn't have a problem. The charger also shuts off if you hook it up wrong so I think it protects itself.
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Battery Charging - Disconnect Ground or Not?
- Thread starter 20774
- Start date
I've started mine with the Battery Tender Jr. connected by accident and didn't have a problem. The charger also shuts off if you hook it up wrong so I think it protects itself.
tinytrains
Still plays with trains.
As I said before. It is just BMW covering their fanny in case your charger goes berserk and cooks your electronics.
josenguyen
New member
Can connect the best OBD2 scanner for scan it to find some error to fix and eares the error code in ECU
dennisdarrow
#4869 Earned Lifetime mem
Wow.......This is fantastic. An oil thread is almost as informative as an electron flow thread. Thanks Kurt..........
crucian
New member
Connect or Disconnect?
Obviously leaving the battery connected to is the correct answer. That said, what you use to charge can have an effect on battery life. Two things deplete batteries, cold and heat, with heat being the most destructive. A modern trickle charger tests the battery voltage from time to time and if it finds a deficiency applies a 2 amp charge until the battery is "topped off". If you were to apply a constant charge, especially above 2 amps, the battery would heat and be destroyed, over time.
Obviously leaving the battery connected to is the correct answer. That said, what you use to charge can have an effect on battery life. Two things deplete batteries, cold and heat, with heat being the most destructive. A modern trickle charger tests the battery voltage from time to time and if it finds a deficiency applies a 2 amp charge until the battery is "topped off". If you were to apply a constant charge, especially above 2 amps, the battery would heat and be destroyed, over time.
pglaves
#13338
Sure - except lots of folks with old bikes never saw an owners manual. Guys with new bikes not so much, but not everybody with a 40 or more year old bike have their little books.
52184
GTRider
True that, but many of those manuals are available yet either in OEM format or reproductions and copies. Manuals are wonderful devices but they do sometimes cost, and we all know the old saw about the cheapest thing on a BMW.
ALL of the 40 year old bikes had lead-acid slosh batteries and many are now being replaced with AGM or other technologies, and those require different chargers than what the OEM info refers to.
Probably safest to say that a battery should be charged according to instructions and equipment specified for that battery by the battery manufacturer.
Best,
DG
