Lithium power for Roomba

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Lithium power for Roomba

Postby plex » November 15th, 2014, 3:24 pm

Hello

I'm consideren to try a lithium battery, after worn out 4 Ni-MH.

What are peoples experience, with Li-ion in the Roomba?

I've found two, that can be bought here in Europe.

They look pretty identically, except from the name...

Has anyone tried one of these two?

http://www.lithiumpowerinc.com/roomba-500-880.html

http://www.anewpow.com/roomba-long-term-li-ion-battery-ap4400-3p.html
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Re: Lithium power for Roomba

Postby vic7767 » November 15th, 2014, 3:56 pm

They are made by the same Taiwan manufacturer, just different dates of build. I use them in all my iRobot robots. Scooba, Roomba R2 and R3s. They perform very well.
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Re: Lithium power for Roomba

Postby plex » November 15th, 2014, 4:19 pm

vic7767 wrote:They are made by the same Taiwan manufacturer, just different dates of build. I use them in all my iRobot robots. Scooba, Roomba R2 and R3s. They perform very well.


Thank you for info :)

I'll give it a try, since it's only a little more, than a aftermarket Ni-MH
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Re: Lithium power for Roomba

Postby staze » November 16th, 2014, 1:34 am

I JUST bought a Lithium batt for my 550 after the NiMH it came with died (bought used). So far, I love it. Even after a solid 1.5h cleaning session, the clean light is still solid green.

Only oddity is the battery fit MUCH snugger in the roomba. Had to physically push it into the unit rather than drop in. But works great!

Good luck. Got mine on eBay for $45 new. :)
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Re: Lithium power for Roomba

Postby Per L » November 16th, 2014, 4:28 am

Is really the charging characteristics of a lithium battery the same as for a NiMH battery? I would guess that the charging electronics is designed for a NiMH battery!

If it is not the same characteristics you ought to get some kind of disadvantages if you change the battery type. Maybe even risks? In the worst case fire hazard?

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Re: Lithium power for Roomba

Postby plex » November 16th, 2014, 5:06 am

Per L wrote:Is really the charging characteristics of a lithium battery the same as for a NiMH battery? I would guess that the charging electronics is designed for a NiMH battery!

If it is not the same characteristics you ought to get some kind of disadvantages if you change the battery type. Maybe even risks? In the worst case fire hazard?

Per L


Hello Per

The lithium batteries for Roomba, has built in microprocessor controlled charging circuit, so it fits the original charger circuit in the Roomba.

http://www.lithiumpowerinc.com/custom-lithium-battery-packs.html
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Re: Lithium power for Roomba

Postby vic7767 » November 16th, 2014, 11:08 am

I've been building and using LI-ion packs in the Scooba as well as the R2 and R3 model Roombas for over 6 years. The LI-ion pack requires a Power Control Board to manage the charge and discharge current/voltage of each cell. Early packs built for the iRobot robots had the PCBs on each cell but there was no additional circuit that could manage balanced charging of each cell. Over time these early LI-ion packs would become unbalanced and the only way to fix them was to open the pack and charge each individual cell. The new LI-ion packs offered by the Taiwan manufacturer contain both the power control board as well as the cell balancing control circuits. Now there is a solution to the only problem that happened to the early LI-ion packs due to unbalanced cells. There have never been fires, or explosions or other electrical type failures when using the charging firmware along with the stock power supply units provided with the iRobot robots.
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Re: Lithium power for Roomba

Postby Per L » November 16th, 2014, 12:22 pm

Thanks, then I am convinced that you are right.
When the battery of my Roomba 630 runs out, I'll probably also buy a li-ion battery even though I don´t really think that the battery capacity is a problem today

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Re: Lithium power for Roomba

Postby plex » November 24th, 2014, 3:00 pm

I can confirm, that the lithium battery rocks... You can hear, the machine is more happy, and it just goes forever without getting tired [SMILING FACE WITH SMILING EYES]
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Re: Lithium power for Roomba

Postby TechGuy » November 24th, 2014, 9:17 pm

plex wrote:I can confirm, that the lithium battery rocks... You can hear, the machine is more happy, and it just goes forever without getting tired [SMILING FACE WITH SMILING EYES]

Make sure to keep your Roomba clean. The Lithium Ion battery may keep you Roomba going and going. If the brushes are not clean, the result is melting plastics due to excessive heating generated by friction.
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Re: Lithium power for Roomba

Postby plex » November 25th, 2014, 2:22 am

Thanks for advise... I normally check the brushes after every second cleaning. I can imagine, it can be a problem with older chm, with protection like the grey chm
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Re: Lithium power for Roomba

Postby davidj988 » December 2nd, 2014, 7:57 pm

These lithium batteries came in 2 months ago and so far so good! The 2 past batteries from irobot for my 560 started to last 15 minutes after a year of use. :( Does anyone know if these batteries will die out as fast as the irobot original battery?
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Re: Lithium power for Roomba

Postby vic7767 » December 2nd, 2014, 8:40 pm

The LI-ion packs could last up to 3 years. A lot has to do with how often you run your Roomba. The LI-ions can be charged around 800 times. Since these packs also come with cell balance logic it adds a lot to the longevity.
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Re: Lithium power for Roomba

Postby formatthias » February 20th, 2015, 8:11 am

Hi,

Does anybody know if the lithium batteries sold ANewPow and Lithium Power Inc are really identical? Because I have problems with the ANewPow batteries.

I bought a battery from ANewPow in Europe but have problems with the charging. If I try to charge it normally, in the base or by plugging in directly into my Roomba 500 I get charging error 2, always.

The only way to get it to charge it to take out the battery, wait 10 seconds and then reinsert the battery and plug in the Roomba directly. Then it charges for a long time with a fast flashing light. After that Roomba works fine and cleans really well for a long while. But having to open the Roomba every time to get it to charge is not really convenient.

The European distributor sent me a second battery, but the problem is the same.

So I am wondering if I should try the battery from Lithium Power Inc, but that would be useless if it's identical. Aslo I have not found it in Europe and shipping from the US is expensive.

Thanks, Mat
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Re: Lithium power for Roomba

Postby vic7767 » February 20th, 2015, 10:39 am

The batteries are from the same manufacturer just a different label on the pack. The err 2 over current failure may be due to a faulty component on the Roomba main board or the power supply.
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Re: Lithium power for Roomba

Postby matofill » February 20th, 2015, 11:42 am

FORMATTHIAS

I can tell you what is your problem !

For LiNMC battery , you must have in 500 series last firmware number 07 from aprox okt 2010.

If you have older FW like 06 or still older , than can happen that, what you wrote , charging error.

So go to service and upgrade your Roomba 500 series to last FW.

And it Will Works :violin:
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Re: Lithium power for Roomba

Postby plex » February 20th, 2015, 1:04 pm

After some months with the lithium battery, I must say I'm very satisfied.... The other day my 780, got stuck somehow, with the result that the Roomba had been working for 5 hours, trying to get loose. When I came home, I rescued Roomba, and it went safely back to dock :)
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Re: Lithium power for Roomba

Postby Vitaliy » July 7th, 2015, 6:07 am

Hi.
Just bought battery from here http://www.amazon.ca/gp/product/B00SWHC39E?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00
After ~16 hours of charging started rapid blinking of orange light, alarm symbol and ERR7. :shock:
Any idea of what happened?
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Re: Lithium power for Roomba

Postby vic7767 » July 7th, 2015, 9:20 am

Yes, the err 7 is the high temp err. This is caused by a false temp reading that is sent by the power control board in the LI-ion pack. Normally the Roomba charging system would stop high current charging when the charging system detects a high temp reading. But for some reason the LI-ion pack is stuck in sending this reading to the Roomba. You should contact the seller for a replacement.
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Re: Lithium power for Roomba

Postby Vitaliy » July 7th, 2015, 5:07 pm

Just checked resistance between small pads. Original battery ~10.8k and new battery is ~1.7k and is is defenatelly NTC as resistance changes with temperature. Could they just put wrong resistor?
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