This video is a follow up to an original video where we uploaded a DIY video where we showed the symptoms that a key fob with bad battery has and the process to replace the battery. We received…
BMW Diamond Key Fob Really Have Rechargeable Battery?
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Thanks MrCuckoobox for your input, very much appreciated. Again, your
input is based on what the manual says and ‘recall’ reading. Anyone out
there actually had a key fob catch on fire or leaked acid due to installing
a non-rechargeable battery???? We want to hear from you.
Dude are you serious with this video? Not to be a dick, but just because
you don’t understand the dynamics of electromagnitism and how it makes
inductive charging possible doesn’t mean it doesn’t exist. It’s a well know
principle that many electronic devices have used in the past and new ones
coming out will used. My electric sonicare tooth brush charges this way,
the tablet I’m writing this on charges this way, the bmw key charges this
way. Google inductive charging and take this video off of you tube because
with all due respect, you sound like a fucking moron.
I though I would try it my self,
Strip the key, turn the ignition, while the multimeter is connected on the
battery,
Voila,,, my battery was at 1,6v watching it climbing to 3,1v in about
45mins
it charges it and its true
It’s a wireless power transmitter!!!!!!! look it up those wires are
windings used to transfer wireless electricity
It’s inductive charging, there is also a coil inside the key. The large
coil you showed is the primary, current flowing through this induces a
charge in the secondary coil within the key this charges the battery.
From page 32 of my 2003 E39 (which uses the same style key) owner’s manual,
it states (there is an arrow at the start of the paragraph, left bottom)
“There is an extended life battery in every master key that is charged
automatically in the ignition lock as you drive.”
The BMW owner’s manual clearly reads that the rechargeable battery in the
key is charged while in the ignition. And also states that it is
recommended to use backup key once a month to maintain key battery. Your
“feeling” that is doesn’t has no merit.
simple question, if the batteries should be change why the key cannot open
easily ??? like in any other vehicle ???
The wireless transfer of electricity is called induction here’s a video
showing all about it 🙂 http://youtu.be/-Wf7aadxBkE
if the battery was indeed being recharged when put in the ignition then it
should never die and would never need to be changed
Even on the older key it recharges, I mean why would they put in a
rechargable baterry if its not charging lol
Thanks for your vids and wanting to get correct info out. As most BMW
owners know BMWs are way over engineered. The fact that the key battery is
charged in the ignition lock is just one example. I believe it is great
that you are showing a way to repair the key when the battery fails and
save some $$. But it is important to make sure you are putting the right
replacement battery in the key. I would not want to be driving at highway
speeds and have a key leak chemicals all over my lap or catch on fire or
destroy my ignition lock.
shadodame
to clear a couple tings up , firstly the bmw manual wouldn’t say that your
key fob is charged while car is running unless it did and second the
charging system is called an INDUCTION charging system , it works the same
way as an electric toothbrush works , try to google it . i have not heard
the fire theory but because the charging current is very slight to the
battery in the keyfob and there is no direct connection to the battery of
the car the only effect it will have on a non rechargeable battery is the
battery wont last as long as it should and why if your going to go to the
bother to change the battery would you not put in a rechargeable battery .
i have just done it for my sisters car an all is good . look up Induction
charging .
To addresses your response to MrCuckoobox, all battery manufactures will
say that you should never attempt to recharge non-rechargeable batteries.
Per the BMW Manual, the battery does get charged. Now putting a
non-rechargable battery in place where it is being charged, I do not
believe is a good idea. If, when, and how that battery will fail, will of
course depend on the type of battery used to replace the old one, the
frequency the key is used and how long it is being charged. I “recall”
reading from a forum that failures occurred on long trips which would make
sense because the battery probably got overcharged and over heated. If
you just drive your BMW to the grocery store every other day ten minutes
each way, you may never have a problem. If you are driving from NY to FL
in a day, I would be concerned.
A VL2020 battery is a rechargeable battery, the coil induces the current
for charging…
inductive charging
same method which is used on say cooker hobs
because its a sealed key
this only reason why it was fitted
See my comments on the original video. The battery is not rechargeable.
The halo is to activate the RFID chip for the security system and
communicate with it. If the lock battery was charged while driving, it
wouldn’t fail and need replacement would it now? :D
Its magnetic induction charging.