[chief1richard]

Any Trackers using Braille Batteries? Seems like a good way to shed some serious weight. Am considering this if there are no serious drawerbacks.

[SEAT TIME RULES]

Originally Posted by chief1richard

Any Trackers using Braille Batteries? Seems like a good way to shed some serious weight. Am considering this if there are no serious drawerbacks.

I know a couple of Time Trial guys that had bad experiences with their Braile's not starting when they needed them to.

I also know others that swear by them..



I've used Anti Gravity batteries in my last 3 cars.

Solid product, and their drop in for the M2 continues that experience.

https://antigravitybatteries.com/pro...tive/ag-h7-rs/

It has the restart feature and also the Bluetooth monitoring..

HTH,
HAZMAT

[F87source]

Originally Posted by SEAT TIME RULES

I know a couple of Time Trial guys that bad experiences with their Braile's not starting when they needed them to.

I also know others that swear by them..



I've used Anti Gravity batteries in my last 3 cars.

Solid product, and their drop in for the M2 continues that experience.

https://antigravitybatteries.com/pro...tive/ag-h7-rs/

It has the restart feature and also the Bluetooth monitoring..

HTH,
HAZMAT

+1

Their restart tech is nice, that way you never get stranded like you could with a braille battery.

[AWC-F87]

Originally Posted by SEAT TIME RULES

I know a couple of Time Trial guys that bad experiences with their Braile's not starting when they needed them to.

I also know others that swear by them..



I've used Anti Gravity batteries in my last 3 cars.

Solid product, and their drop in for the M2 continues that experience.

https://antigravitybatteries.com/pro...tive/ag-h7-rs/

It has the restart feature and also the Bluetooth monitoring..

HTH,
HAZMAT

Did you have to code the car for it?

[F87source]

Originally Posted by AWC-F87

Did you have to code the car for it?

Yes code the proper AH of the battery so the ibs doesn't over or think it's and old battery and under charge it.

[ZM2]

Any cheaper options that save weight?

I need to get a new battery soon and I’m not sure that dropping an extra $700 to save 30lbs in the rear of the car that is already light relative to the front is going to provide that much time advantage on track.

[F87source]

Originally Posted by ZM2

Any cheaper options that save weight?

I need to get a new battery soon and I’m not sure that dropping an extra $700 to save 30lbs in the rear of the car that is already light relative to the front is going to provide that much time advantage on track.

If you want, you could always buy a standard but smaller car battery so long as it has enough cold cranking amps to start the car, and just code the correct AH via ista so the car properly charges it. The only issue is if you daily a car with a downsized normal agm battery it could complete die on you if you like to listen to the radio while the car is in accessory mode, because agms don't run as low as lithium batteries can. So if you do run a smaller battery just buy one of those jumper packs and carry it with you.

[SEAT TIME RULES]

Originally Posted by AWC-F87 View Post
Did you have to code the car for it?

No you do not have to code this AG battery.

I went thru all that with my tech and AG.

Its software is designed to work with the drop in battery voltage..

Any cheaper options that save weight?

ZM2, I ran a couple of their 4-5 lb starter batteries in my EVO & Miata. Cold Crank was fine... you can fit it in the tray with some foam spacers to keep it from moving.

https://antigravitybatteries.com/pro...-oem/atx30-hd/

Its priced close to a Lead Acid drop in and weighs next to nothing.

I'd drop the owner of AG a note asking for his opinion on which small case battery to use. He helped me on which ones to use.

You can always add a Micro Start option to make sure you don't get stranded.

Let us know how it goes!

[F87source]

Originally Posted by SEAT TIME RULES

Originally Posted by AWC-F87 View Post
Did you have to code the car for it?

No you do not have to code this AG battery.

I went thru all that with my tech and AG.

Its software is designed to work with the drop in battery voltage..

Any cheaper options that save weight?

ZM2, I ran a couple of their 4-5 lb starter batteries in my EVO & Miata. Cold Crank was fine... you can fit it in the tray with some foam spacers to keep it from moving.

https://antigravitybatteries.com/pro...-oem/atx30-hd/

Its priced close to a Lead Acid drop in and weighs next to nothing.

I'd drop the owner of AG a note asking for his opinion on which small case battery to use. He helped me on which ones to use.

You can always add a Micro Start option to make sure you don't get stranded.

Let us know how it goes!

Hmm interesting, I remember talking to anti grav too, and they told me that the battery's charging hardware was designed to work with the voltage that the car would charge an agm battery, which is usually higher than what a litiun battery would like to charge at. Because agms charge at like 14v and lithium batteries charge at 12-13v.

So registering the battery has nothing to do with charging voltages, it just helps the car learn that yes the battery capacity is now lower than before, so don't try to over charge it because it won't be useful. Then it will also teach the car that since the battery capacity is lower don't trigger battery discharge warnings prematurely.

[SEAT TIME RULES]

Originally Posted by F87source

Hmm interesting, I remember talking to anti grav too, and they told me that the battery's charging hardware was designed to work with the voltage that the car would charge an agm battery, which is usually higher than what a litiun battery would like to charge at. Because agms charge at like 14v and lithium batteries charge at 12-13v.

So registering the battery has nothing to do with charging voltages, it just helps the car learn that yes the battery capacity is now lower than before, so don't try to over charge it because it won't be useful. Then it will also teach the car that since the battery capacity is lower don't trigger battery discharge warnings prematurely.

From The AG FAQ page:

What is the range of voltage for your Lithium batteries?

13.2 – 13.4 V.

The Antigravity Battery normal voltage is 13.2V. The battery will read up to 14.7V immediately after charging. The normal operating range will read between 13.3-14.5V. After a few hours it will self-balance to the 13.3-7 range which is its normal state of charge. The maximum voltage the battery should be exposed to is 14.7V. On the lower end of the voltage range the battery should be put on a charger if the battery voltage drops below the 12.5V range while sitting. The voltage should not be allowed to drop below 11V while at rest. Permanent damage may occur below 11 volts.

[AWC-F87]

Originally Posted by SEAT TIME RULES

Originally Posted by AWC-F87 View Post
Did you have to code the car for it?

[COLOR="Red"]No you do not have to code this AG battery.

I went thru all that with my tech and AG.

Its software is designed to work with the drop in battery voltage..[/COLOR]

Any cheaper options that save weight?

[COLOR="red"]ZM2, I ran a couple of their 4-5 lb starter batteries in my EVO & Miata. Cold Crank was fine... you can fit it in the tray with some foam spacers to keep it from moving.

https://antigravitybatteries.com/pro...-oem/atx30-hd/

Its priced close to a Lead Acid drop in and weighs next to nothing.

I'd drop the owner of AG a note asking for his opinion on which small case battery to use. He helped me on which ones to use.

You can always add a Micro Start option to make sure you don't get stranded.

Let us know how it goes!
[/COLOR]

Thank you!

Which amp hour choice did you make for your m2 using the antigravity battery in your link?

[F87source]

Originally Posted by SEAT TIME RULES

From The AG FAQ page:

What is the range of voltage for your Lithium batteries?

13.2 – 13.4 V.

The Antigravity Battery normal voltage is 13.2V. The battery will read up to 14.7V immediately after charging. The normal operating range will read between 13.3-14.5V. After a few hours it will self-balance to the 13.3-7 range which is its normal state of charge. The maximum voltage the battery should be exposed to is 14.7V. On the lower end of the voltage range the battery should be put on a charger if the battery voltage drops below the 12.5V range while sitting. The voltage should not be allowed to drop below 11V while at rest. Permanent damage may occur below 11 volts.

That's exactly what I said...

The battery can take how the car charges it no problem, because the car is used to charging agm batteries at 14.7 volts and this battery can take it no problem.

You code it so the car's ibs knows the battery has less capacity than before, so it doesn't try to over charge it. Or if your previous battery was so worn down to the point where the cars adaptive charging system thinks it has even less capacity than the new 80AH AG battery it doesn't under charge it. So after you code it let's say the battery drops to 11.9 v after alot of accessory mode and listening to the radio, the car will understand that since it's a smaller battery it depletes faster so throw the low battery code, and it won't throw excessive discharge or battery fault codes because it thinks the stock 90+ah battery is in there and somehow it's draining faster than it should. Or if the car is used to an older battery and you swap in a new AG battery it doesnt wonder why all of a sudden the battery is able to take more charging and not hit the 12.XX volts that it normally does, and since it doesn't want to over charge the battery and cause an issue it will just leave the battery a bit undercharged. I've seen alot of AGM guys not code new batteries and wonder why it is always undercharged because of this reason.

You don't code the car for charging voltage, you code it so it knows age of the battery and capacity.


I should also say i'm not a huge battery expert so I could be wrong, but this is what I learned when I swapped out my m235i's battery (for another stock one).

[F87source]

Originally Posted by AWC-F87

Thank you!

Which amp hour choice did you make for your m2 using the antigravity battery in your link?

Yeah also curious about this, I was thinking 40AH should be enough, since the car with the radio on in accessory mode seems to be pulling 20 amps. It should be enough for 2 hours of use if you run the battery flat which is not ideal, so 1 hour of real world use should be fine in case I am waiting for someone and like to sit and listen to the radio for a bit. Plus the restart tech should help no problem.

[SEAT TIME RULES]

Originally Posted by AWC-F87

Thank you!

Which amp hour choice did you make for your m2 using the antigravity battery in your link?

40 Amp , also lowest weight 15.6 lbs.

I only hook up my trickle charger if the car is going to sit for over 5 days.

Its been rock steady so far 1yr+

I just ran a battery test and its at 100% /13.38V...

Cool BT software

[F87source]

Originally Posted by SEAT TIME RULES

40 Amp , also lowest weight 15.6 lbs.

I only hook up my trickle charger if the car is going to sit for over 5 days.

Its been rock steady so far 1yr+

Have you had the car in accessory mode for any length of time? Just curious to see how long it lasts.

BTW can you post a picture?

[SEAT TIME RULES]

Originally Posted by F87source

Have you had the car in accessory mode for any length of time? Just curious to see how long it lasts.

BTW can you post a picture?

https://antigravitybatteries.com/pro...acker-lithium/

Does a bunch of things and I can always check what's up with it as well....

I've done extensive BM3 flashing on my S55 (Cary Jordan custom tune), in one case for about 1hr with the ignition on but engine off. Lights, and everything lit up Still had plenty of charge left on it.

[ZM2]

So, there are times when my car sits for 2-3-weeks and I’m unable to trickle charge. Thoughts on if the Ah matters in that scenario with this type of battery?

Thanks guys.

[F87source]

Originally Posted by ZM2

So, there are times when my car sits for 2-3-weeks and I’m unable to trickle charge. Thoughts on if the Ah matters in that scenario with this type of battery?

Thanks guys.

Well with a larger ah it can sit for longer before being depleted by the idling electronics in your car. So yes AH matters on how long your car takes to complete deplete the battery.

But if you have the restart tech on the ag battery it'll cut off the power to the car at a certain point and hold enough charge for a couple of starts when you reactivate it.

But tbh I think even 40ah is enough for 2-3 weeks of sitting still, unless you have other electronics in the car on like the alarm, dash cam, trackers etc.

[F87source]

Originally Posted by SEAT TIME RULES

Attachment 2538000

https://antigravitybatteries.com/pro...acker-lithium/

Does a bunch of things and I can always check what's up with it as well....

I've done extensive BM3 flashing on my S55 (Cary Jordan custom tune), in one case for about 1hr with the ignition on but engine off. Lights, and everything lit up Still had plenty of charge left on it.

Perfect, I'll be getting a 40AH variant when my battery kicks the bucket. It'll help save weight in the back for my 10L water reservoir for the sprayers lol.

[SEAT TIME RULES]

Originally Posted by F87source

Perfect, I'll be getting a 40AH variant when my battery kicks the bucket. It'll help save weight in the back for my 10L water reservoir for the sprayers lol.

The 40H is all you need.....

In fact I probably could have gone with the lighter battery I posted earlier.

But the restart tech and the battery Monitor was icing on the cake.

Yes its $900 but they last and the weight savings is important to me.

My M2C was weighed when I first got it with around 1-1.5 gallons of gas in it.

3498 lbs. (6spd/slicktop)

I can't wait to find out what it weighs now.

Weight savings:

Battery swap 47 lbs

Rear seat delete (w/belts and side cushions)-60lbs

Exhaust-20 lbs

Essex BBK-35lbs of less unsprung weight

3498-162=3336 lbs...

Later this year I'll swap out the seats which weigh 115lbs

For a pair of Nogaro's + Bray Krause harness bar & 6 pt belts

Probably around 45-50 lbs less...

I like my HP/Weigh ratio :-)

594/3400=17.5

[TargaM2]

https://www.lithiumax.com.au/shop

I have been using Lithiumax in my race cars & have a Race9+ for my M2.
3kg (6 lbs) & incredible power specs. My cars sit for long periods of time & never require any charging whatsoever. Plug & play with car specific fitting kit.

[F87source]

Originally Posted by TargaM2

https://www.lithiumax.com.au/shop

I have been using Lithiumax in my race cars & have a Race9+ for my M2.
3kg (6 lbs) & incredible power specs. My cars sit for long periods of time & never require any charging whatsoever. Plug & play with car specific fitting kit.

Awesome!!!!!!!

Thanks for the link man.