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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 07-30-2016, 03:52 PM   #1
tsegreto
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Will this work for constant battery voltage during tuning?

I am going to be doing some remote tuning by Frank Smith, will this product do the job of keeping my battery at a consistent voltage while tuning?

Schumacher SC-1200A
https://amzn.com/B000BQSIWK

If not could someone please provide me with a product that will (within a reasonable price)

Thank you.
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Old 07-30-2016, 03:53 PM   #2
peytonracer4
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Yeah that'll work just fine. I think you only need like 1.5 amps. And you can get one of those basic battery tenders for probably $25 that do a 1.5 amp charge. But that will be useful otherwise
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Old 07-30-2016, 04:27 PM   #3
tsegreto
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Quote:
Originally Posted by peytonracer4 View Post
Yeah that'll work just fine. I think you only need like 1.5 amps. And you can get one of those basic battery tenders for probably $25 that do a 1.5 amp charge. But that will be useful otherwise
Will this do the job?

12V/1.2A Transportable 3-mode Battery Charger Tender Motorcycle Car Boat ATV RV https://www.amazon.com/dp/B00QI7BO22/ref=cm_sw_r_cp_api_cUrNxb1V6JGGZ
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Old 07-31-2016, 12:17 PM   #4
Radnor
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Buy the fist one you posted, you will own this charger for the rest of your life and it will be very useful. Trickle chargers are much more limited.
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Old 07-31-2016, 03:31 PM   #5
tsegreto
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Originally Posted by Radnor View Post
Buy the fist one you posted, you will own this charger for the rest of your life and it will be very useful. Trickle chargers are much more limited.
After my M3 dies I'll probably get a tesla - not looking for a long term investment that I will never use just to hear my girlfriend say, "Why do you need this?" Just looking for something to get the job done.
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Old 08-01-2016, 10:32 PM   #6
Commando
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Radnor has the right idea.
Buy at least the 12A model with the accessories too. Long leads come in handy so often.

Interrupting a DME flash is definitely not a good idea.
The M3 draws far too much current for a straight trickle charger. Mine uses around 10A although it fluctuates up to around 14A at times. So this should be considered the minimum charge capacity (Amps) of your charger. I use a 25 Amp model.
Bonus is if you get stuck with a dead battery you will be up and going much sooner too.
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