12V Battery charger for Flashing ECU-s????

**Louislesinge** · 28th October, 2018, 12:30 PM

Hi,

Originally Posted by caja88

why so many ampere? something like this wont be enough? https://www.conrad.at/de/velleman-la...1-x-94001.html

Let me tell you i do reprogram ECUs every day at work using the Gysflash 50.12 and when i connect it to the car in showroom mode regulated to 13V , car sucks about 50Amps first. When reprograming begins it sucks about 30Amps if fan runs, if not it sucks about 15Amps.
Another low cost solution i thought on many times is buying a VELIKA power supply 13,8V 1000W for... 70€, but it would be only a power supply, not charger like Gysflash. This solution needs to buy good wires and battery clamps: cost will up to 50€ more.
Greetings,

**caja88** · 28th October, 2018, 12:48 PM

U,sorry guys,i thougt the discoussion was about voltage on flashing on bench etc...

**caja88** · 28th October, 2018, 01:00 PM

Im having problems with my boot adapter (KESS cone),power supply adaptor gives 12.3V ,but on the cable im getting 0.25V .anyone had that problem?44932957_1156735791118359_8081856045535723520_n.jpg 44857155_280424892809660_3758134282791419904_n.jpg 44897521_1945956352163055_5851186654903009280_n.jpg
EDIT:Has anyone checked his boot adapter,i think mine is not good???

**kubuswujo** · 28th October, 2018, 01:18 PM

caja88 Labratory would not be enought even for some ecus like SID208 on Ford transit. Ecu on table need 15A on start. So i had to use agm battery.
Only 5A from Labratory power supply was not enought.

And we are talking about charger/power supply connected to vehicle battery. I bought Telwin Doctor Charge 50 and i hope that 50A will be enpught to most of cars.

EDIT: now i have seen your last posts, I have an ori Ktag and even ori Ktag Power supply adapter is not good. Ita makes max 5A. I have also Magpro x17 ori supply and i use it, when i connect Ktag.

Its strange that Even Alientech cannot give a good power supply from 230AC to 14DC. And you have to use external battery for some ecus.

**Faraday** · 28th October, 2018, 01:58 PM

Originally Posted by kubuswujo

Hi!
I am looking for good and stable battery charger for ECUs Flashing.

Till now i am using a standard 50A 12V/24V Battery charger (600A while starting Car)
but its not eleectronical charger and it does not give stable Voltage on output.
I need sth that will make stable Voltage on output and will have minimum 50A (BMW F series flashing).

What are you using while flashing?

I have found GYSFLASH charger but whant to know what you are using and what is worth buing?
Any other producer then Gysflash?

Thank in advance
Kuba

I use TELWIN Dr Charge 50 for BMW

**caja88** · 28th October, 2018, 02:25 PM

so the safest way for bench,external battery with charger?

**kubuswujo** · 28th October, 2018, 02:36 PM

Yes, I use a battery like this, its a small 12v AGM Motorcykle battery:
akumulator-zelowy-12v-5a_2327.jpg
akumulator-zelowy-12v-5a_2327.jpg
But i use it only for ecus that need more Ampere. For 90% of ecus to do on table, Ori or clone AC/DC adapter is enought.

**caja88** · 28th October, 2018, 04:34 PM

may i ask which ecus need more ampere? I need to learn...very much as i see

**teerak2uk** · 31st October, 2018, 05:51 PM

10a for bench is good enough
50a for obd is recommended but on some cars you still need to disconnect fans (DON`T FORGET TO RECONNECT THEM)

**caja88** · 5th November, 2018, 08:01 PM

Has anyone checked his kess clone boot adapter???I think mine is not ok???

**teerak2uk** · 5th November, 2018, 09:02 PM

Originally Posted by caja88

Has anyone checked his kess clone boot adapter???I think mine is not ok???

Better to put your post in chiptuning thread

**rh03** · 8th November, 2018, 04:24 AM

I continue the topic, because I want buy telwin doctor charge 50 because it is low cost, it is safe for Fxx series?, and for other cars? can it really provide 13.5/14v and 45/50A?

someone said, disconnect the fan for more security? Maybe if you disconnect the fan, you can crash the obd flash, because you will flash the car with DTC ?

It is safe to disconnect fan or you can have problem during flash because of that ?

**teerak2uk** · 8th November, 2018, 08:13 AM

Disconnect them when possible I did an S6 recently and it started writing the files and fans kicked in and maxxed my psu out at 50a and stopped it writing until I disconnected them luckily no problems this time

**Meat-Head** · 8th November, 2018, 02:42 PM

If you have to go to a parking lot get a 150amp alternator off something
go steal a cement mixer engine, make one, only on 20 mins or so, not like going to be running hours on end

**rh03** · 9th November, 2018, 02:25 AM

And if you use a second battery ?

doctorcharge on second battery, and second battery on the car's battery with cables?

You should have more Amper ?

I understand the princip of Volts on cars but Amper is mystérious for me.