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Ohmmu LiFePO4 12v Battery Now has Built-in Bluetooth - Install and App Review

1823 Views 19 Replies 13 Participants Last post by  TechnicallyJeff
I've had my Ohmmu 12v battery for a few months with no issues and recently saw someone post about the Ohmmu app and monitoring their 12v battery. I didn't realize they recently they came out with an updated battery with bluetooth built-in, which is awesome. I installed the new one yesterday and tested out the app, which is simple but works well. It's definitely a nice feature to have. Check out the video below and let me know if you have any questions! 馃槂

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Interesting.

Shame we can not get these in the UK.

Still wonder if this invalidates the warranty, in the UK when I had an issue with my battery the dealer states that fitting a third party battery will invalidate the warranty on the car.

Maye be in the USA it is different rules.

Would be good to know what your battery is doing and with the app it makes it so simple. (y)
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Interesting.

Shame we can not get these in the UK.

Still wonder if this invalidates the warranty, in the UK when I had an issue with my battery the dealer states that fitting a third party battery will invalidate the warranty on the car.

Maye be in the USA it is different rules.

Would be good to know what your battery is doing and with the app it makes it so simple. (y)
aren't all batteries third party? Kia doesn't make 12v batteries as far as I know.
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Interesting.

Shame we can not get these in the UK.

Still wonder if this invalidates the warranty, in the UK when I had an issue with my battery the dealer states that fitting a third party battery will invalidate the warranty on the car.

Maye be in the USA it is different rules.

Would be good to know what your battery is doing and with the app it makes it so simple. (y)
In the USA we have an act that says if a part fails, the manufacturer would have to prove it was due to an aftermarket part for it to not be covered.
Interesting.

Shame we can not get these in the UK.

Still wonder if this invalidates the warranty, in the UK when I had an issue with my battery the dealer states that fitting a third party battery will invalidate the warranty on the car.

Maye be in the USA it is different rules.

Would be good to know what your battery is doing and with the app it makes it so simple. (y)
there are other lithium batteries available in the UK (see links) - but not sure re compatibility, anyone know?

Also re warranty ive heard a few people say that but it doesnt make much sense since the 12v warranty is only 2 years...so are we not allowed to change it after that either? must wait months to get a specific kia replacement?

12V 100Ah Lithium Iron Phosphate Battery w/ Bluetooth

https://ecotreelithium.co.uk/category/lithium-iron-lifepo4-batteries/electric-vehicle-batteries/
aren't all batteries third party? Kia doesn't make 12v batteries as far as I know.
I assume KIA doesn't actually make a whole raft of things that are in the EV6, but that doesn't mean you won't invalidate the guarantee in some markets if you replace them with something else.
In the U.S. 12V battery coverage is 3 years/36K miles and of course applies only to/for the OEM 12V battery. Not that you can't replace the OEM battery with an Ohmmu or other third-party battery during the warranty period but I would imagine that Kia certainly won't reimburse you for the cost of having purchased one.

A shrewd person would/should simply have Kia replace the OEM battery (while still under warranty) and then go buy a more reliable battery anyway--that way you'd still have a new replacement OEM battery handy as a backup at no additional out-of-pocket cost (or sell it to someone else who needs a good battery for cheap).
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there are other lithium batteries available in the UK (see links) - but not sure re compatibility, anyone know?

Also re warranty ive heard a few people say that but it doesnt make much sense since the 12v warranty is only 2 years...so are we not allowed to change it after that either? must wait months to get a specific kia replacement?

12V 100Ah Lithium Iron Phosphate Battery w/ Bluetooth

https://ecotreelithium.co.uk/category/lithium-iron-lifepo4-batteries/electric-vehicle-batteries/
Thanks.

Yes it seems no two dealers say the same.
I've had my Ohmmu 12v battery for a few months with no issues and recently saw someone post about the Ohmmu app and monitoring their 12v battery. I didn't realize they recently they came out with an updated battery with bluetooth built-in, which is awesome. I installed the new one yesterday and tested out the app, which is simple but works well. It's definitely a nice feature to have. Check out the video below and let me know if you have any questions! 馃槂

Any issues or concerns with charging it below freezing?
Any issues or concerns with charging it below freezing?
Have had mine over a month, charging most nights below freezing with no concerns so far.
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Any issues or concerns with charging it below freezing?
I'm not worried. Ohmmu said the battery is designed for a variety of temps. And the car has systems in place that try to modulate temps for the main battery which impact the 12v battery too.
When disconnecting the battery, is there anything reset (date, time etc) that we would need to then reconfigure. Does the radio loose its presets etc?
When disconnecting the battery, is there anything reset (date, time etc) that we would need to then reconfigure. Does the radio loose its presets etc?
No.
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When disconnecting the battery, is there anything reset (date, time etc) that we would need to then reconfigure. Does the radio loose its presets etc?
Everything was saved for me both times.
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Thank you.
I'm sourcing stock in New Zealand.
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@TechnicallyJeff Thanks for sharing these reviews, it's really interesting!

I'm wondering if you could test how the Ohmmu interacts with the "aux battery saver", and the 12V state of charge value available from the OBD2 port.

Given that Ohmmu's own marketing material shows the output voltage 1-2V higher than stock lead-acid, it seems that this would have the potentially negative effect of defeating the "aux battery saver" (the yellow light), since the car would be unable to accurately determine the 12V state of charge.

Is this something you'd be willing to test? Perhaps place a load on the 12V while monitoring the OBD2 SoC, and see if/when "aux battery saver" activates?



Rectangle Slope Plot Font Line



It seems many people have been happy with the switch, I'm just a bit skeptical - due to the voltage mismatch, as well as the apparent build quality. Thanks!
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When my ICCU failed I was so happy that I still have my OEM battery under the hood. Probably they could not blame a regular flooded acid battery, but I won't hold my breath if they see an unapproved part (like Ohhmu) that can damage the electrical system per the owner manual.

By the way my car is still waiting on the parking lot for an ICCU replacement for a week. No ETA in sight.
@TechnicallyJeff Thanks for sharing these reviews, it's really interesting!

I'm wondering if you could test how the Ohmmu interacts with the "aux battery saver", and the 12V state of charge value available from the OBD2 port.

Given that Ohmmu's own marketing material shows the output voltage 1-2V higher than stock lead-acid, it seems that this would have the potentially negative effect of defeating the "aux battery saver" (the yellow light), since the car would be unable to accurately determine the 12V state of charge.

Is this something you'd be willing to test? Perhaps place a load on the 12V while monitoring the OBD2 SoC, and see if/when "aux battery saver" activates?



View attachment 14450


It seems many people have been happy with the switch, I'm just a bit skeptical - due to the voltage mismatch, as well as the apparent build quality. Thanks!
@TechnicallyJeff or others using this battery -- Are you still using the Ohmmu? Any further insights a couple months in? Any insights from the BT monitoring... or issues? Many thanks!
I have the new battery from OHMMU. I left the Liftgate open and Dash Cam and AI-box on for a couple of hours. When I came back the yellow light turned on and charged the battery for about 30 minutes and the State of Charge of the 12v Lithium came up to 97% @ 13.5 volts. I checked that with their app on my iPhone.
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@TechnicallyJeff or others using this battery -- Are you still using the Ohmmu? Any further insights a couple months in? Any insights from the BT monitoring... or issues? Many thanks!
Yeah I'm still using it. Haven't had a single issue. I check it with the app every now and then and everything is looking good.
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