Parasitic Battery Drain: What is the Maximum Current Draw?

Подписаться 59 тыс.

Просмотров 13 тыс.

50% 1

See the full course and MORE!
Join Mechanic Mindset and get a FREE multimeter!
www.mechanicmi...
Knowing the battery current drain limits will be important to confirm whether you have a parasitic draw or not (aka quiescent current draw). Most vehicles all around the same value of current drain, usually measured in milliamps. We also look at what value you are expecting on the multimeter amp setting as this can sometimes be confusing. If you get the right information from the customer, regarding how long the vehicle takes to drain, you will get a good idea of how big the parasitic draw is and give you better expectation of the battery current drain value.
My PicoScope Set Up: kit.co/mechani...
Follow us on Facebook: / mechanicmindset
The Mechanic Mindset channel is here to help you improve your automotive diagnostic skills. We upload regular, easy to understand, automotive training and tutorial videos covering topics such as; oscilloscope diagnostics, PicoScope, CAN bus, waveform analysis and much more! Subscribe to stay up to date!

Опубликовано:

26 сен 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 32

@JohnDoesGarage 9 месяцев назад

I'm taking the oscilloscope course and it is amazing. I highly recommend it if you are interested in learning how to use an oscilloscope for diagnostics, which, in my humble opinion, is a necessity for the complex systems on modern vehicles.

@MechanicMindset 9 месяцев назад

Glad you’re enjoying the lessons! Anything you’d like us to cover in there that you haven’t seen already?

@daviddake22 9 месяцев назад

Thanks for the heads up, I will absolutely be taking it soon

@sefofatai6618 9 месяцев назад

I purchased the small original 2204a and after signing up for the course. I learned so much that I purchased the Pico 4 channel 4425a for a little over 3k. Very happy learning my new equipment.

@MechanicMindset 9 месяцев назад

That’s great to hear. Such a powerful tool And the 2204a will teach you a lot, plus you will appreciate the 4425 more 👍

@MiracleMAX 9 месяцев назад

Excellent explanation Darren! It's a good topic to discuss with a range of testing procedures. Keep up the good work. It'd be great to catch up one day 😉

@MechanicMindset 9 месяцев назад

Cheers! I live a good puzzle like a batter drain 😁 For sure, we definitely should. Ping me an email.

@anthonysova7117 9 месяцев назад

Nice video and needed knowledge A rule of thumb for parasitic drain is reserve capacity divided by 4 but OEM is best CHEERS

@jameswhite1319 9 месяцев назад

Good morning to all

@colinreid7305 9 месяцев назад

Covers an important topic that is sometimes not fully understood in terms of preparation and correct use of test instruments. I have no doubt people that use you courses will be much better equipped in dealing with complex diagnostics.

@MechanicMindset 9 месяцев назад

Thanks Colin, I often come across minor errors or misunderstandings when people perform this test 👍

@jgranger2002 9 месяцев назад

I run my multi meter on the 10 amp fuse. I don't need to see lower draw than that. Blowing the fuse in your meter as always a pain. Problem comes when you locate the an excessive draw on a circuit that powers many different things on the car. Example the backup fuse in an acura tl. If you don't know that the handsfree ecu goes bad and stays on causing a 220 milliamp draw you might never find the problem.

@deisediagnostics629 9 месяцев назад

Good information Darren thank you man👍

@MechanicMindset 9 месяцев назад

Cheers mate!

@djmobileauto 9 месяцев назад

Yo D.solid video bro

@stephanevaucelles6378 9 месяцев назад

hello , thanks for video

@lorenzofranciscogonzalezmu3849 9 месяцев назад

Hola Darren acabo de adquirir el pico 2204A puedo conseguir el software para Windows XP ? O tengo qué cambiar de Laptop con Windows 10?

@MdRubel-gy8ms 9 месяцев назад

Hello I m mdrubel mechnice from bangladsh sir I can your training aloline please

@thebluelunarmonkey 9 месяцев назад

Agree with your range. I have always used 40mA rule of thumb regardless of vehicle. Less than that is perfectly fine and if it's more than that I look for a modification drawing extra current, like an aftermarket sound system or security system, pull the fuse and recheck draw. 40mA will also run the starter at two weeks but not 4 weeks with smaller batteries(75% discharged), and will be hit or miss with mid size batteries(50% discharged). Size counts. A puny 40Ah battery shouldn't have a massive 65mA draw.

@MechanicMindset 9 месяцев назад

That’s it, it’s all relative 👍 cheers!

@alanjackson4397 9 месяцев назад

I have an unrelated question. What if you’re using PicoScope leads set on 10 attenuation and you plug it into a 20 attenuator. Will you get 30 or what will happen?

@MechanicMindset 9 месяцев назад

The reading will be wrong by half

@modassirfaruq7397 9 месяцев назад

Sir what is the law for battery discharge day ?

@thebluelunarmonkey 9 месяцев назад

Simple. 24 hours in a day. Multiply current draw by 24 to get mAh or Ah draw. 1 amp constant draw for 1 hour is 1 amp hour (Ah). The number I've typically used for normal parasitic draw is 40mA. That is 40mA x 24 hours = 960mAh or 0.96Ah. For a smaller AGM battery that's 40Ah capacity, you'll completely discharge the battery in 40 days. Most starting batteries will advertise CCA and not Ah since they are never meant to be discharged, their purpose is to deliver cranking amps for a short time before being recharged. Completely discharging a starting battery will damage it.

@modassirfaruq7397 9 месяцев назад

@@thebluelunarmonkey thank you so much