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BMW 3-Series (E90 E92) Forum
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which battery charger should I buy?
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08-01-2016, 11:27 PM | #1 |
Eric_Y
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which battery charger should I buy?
Hi everyone,
I need to get a battery charger for the car in order to flash PPK. I have no knowledge on battery charger so I got confused after some research. Some products are labelled for a certain voltage; while others are for a certain (maybe range) ampere. Which factor should I look at when sorting a proper battery charger? Voltage, current or power? Anyone knows any local product for 335i? Thanks a lot guys |
08-01-2016, 11:33 PM | #2 |
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Just get this, will be more than enough for any type of flashing you need
http://www.ebay.com.au/itm/12V-240V-...UAAOSwMHdXR66x Make sure you connect it up to the terminals in the engine bay and not across the battery: The negative terminal must be attached to the shiny hex stud. If you clamp on something like the strut tower bolts they are galvanised and give you poor electrical contact.
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08-01-2016, 11:38 PM | #3 | |
Eric_Y
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08-02-2016, 12:12 AM | #6 |
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Forget the CTEK, its not powerful enough. The one I linked is 20 amp, plenty powerful enough to charge the battery even if you leave the headlights on.
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08-02-2016, 12:19 AM | #7 | |
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Just want to check, connect the cables to + & - terminal prior switching on the battery charger? one more thing, is it ok to help people jump starting their car? I read somewhere before saying that the European car electrical system is so complicated that better not jump starting which may damage the car electrical system? |
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08-02-2016, 12:57 AM | #8 | |
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08-02-2016, 01:36 AM | #9 |
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I think Bmw recommends a minimum of 50 amps for coding.
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08-02-2016, 01:55 AM | #10 |
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Why cant you connect directly to the battery to charge
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08-13-2016, 08:34 AM | #11 |
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08-13-2016, 08:49 AM | #12 |
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I bought ctek mxs 5 from repco with 5 year warranty and im sure its 12 volt, 5 amp.. have not tried it out yet.. bmw sells the same one but not sure if coding requires higher amp..
Last edited by e36mmm; 08-13-2016 at 08:55 AM.. |
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08-13-2016, 09:01 AM | #13 |
Eric_Y
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to be honest, I don`t know this yet. My coder told me to get a charger which has 12+ amp.
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08-13-2016, 09:09 AM | #14 |
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I used a 5 amp ctek to flash the ppk on a flat battery and it worked, I now own a 15 amp ctek.
They are great chargers. |
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08-13-2016, 09:10 AM | #15 |
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08-13-2016, 09:37 AM | #16 |
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08-13-2016, 06:01 PM | #17 | |
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or you could just avoid all that and know you're safe by getting the charger vtl linked. yer sure you will probably be fine without taking those precautions but the thought of a bricked dme scares me lol |
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08-13-2016, 06:12 PM | #18 |
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also as vince pointed out the charger needs to go as close to the dme as possible under the bonnet in the spots he indicated. it doesn't matter how strong your battery is (or how thick the cable is) any sudden current draw will cause a momentary drop in voltage due to the inductance of the long cable running from the boot to the engine bay. again up to you if you want to risk it but there is a reason bmw put terminals in the engine bay.
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08-15-2016, 07:54 PM | #20 |
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08-15-2016, 08:07 PM | #21 |
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As long as you hook up via the terminals in the engine bay it'll be fine.
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