About battery in Neato XV-11

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About battery in Neato XV-11

Postby darthvictor » November 2nd, 2010, 8:13 pm

Hello, I am planning to get a Neato for my condo unit. Just one thing holding me back for now is that I heard so often that Roomba's battery done within a year or so, I am afraid this will happen to Neato too, is it the case? How often the battery need to be replace?

Thanks.
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Re: About battery in Neato XV-11

Postby sageman » November 2nd, 2010, 8:19 pm

the neato has only been out for a few months so no-one can be sure
400/disco disassembly's (everything down to the PCB)
http://www.robotreviews.com/wiki/400disco-disassembly

one day many years from now a person will say "right I'll just ROOMBA downstairs" instead of hoover
oh wait I already do :)

main bot: neato xv-15 (Europe xv-11)
to sell (one day): roomba sage and silver (both 400's)
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Re: About battery in Neato XV-11

Postby gluc0se » November 2nd, 2010, 10:58 pm

Taking a guess but I bet the Neato battery will prob last around a year also. That seems about typical for many battery powered devices.
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Re: About battery in Neato XV-11

Postby dj_siek » November 3rd, 2010, 12:57 am

my roomba (560) battery has lasted 3 years.
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Re: About battery in Neato XV-11

Postby darthvictor » November 3rd, 2010, 10:32 am

Haha.. sorry, totally forgot about Neato is a new product.
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Re: About battery in Neato XV-11

Postby RobotNewbie » November 3rd, 2010, 11:54 am

What are the best practices for the battery to prolong life? Should it be kept in the charger between uses? Should it have an occasional complete discharge? Is it better to run it for a while before recharging or is it OK to run it briefly and then recharge?
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Re: About battery in Neato XV-11

Postby gluc0se » November 3rd, 2010, 12:38 pm

Although I am going by what IROBOT says. They say leave the robot connected to the charger at all times that you aren't using it for best battery life.


dj_siek wrote:my roomba (560) battery has lasted 3 years.


WOW, That is great. My factory battery only lasted around a year. The battery still works to this day but you maybe get only 40 minutes of run time.
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Re: About battery in Neato XV-11

Postby dj_siek » November 3rd, 2010, 9:15 pm

ahh ok. well to be honest I never watch my roomba do its thing I hate having it on when i'm home (it always seems to find me)

So perhaps my battery is lasting only 40 mins as well but it cleans my apartment very well and the mrs still likes it so no worries!
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Re: About battery in Neato XV-11

Postby paolostar » November 4th, 2010, 7:41 am

Each battery pack is 7,2V 3200 mAh, 23,0 Wh...it should not be difficult to find a compatible one.

I don't understand the 4 wires connection...what are the 4 wires for?
Does a pack consist of 2 subpacks 3,6 V with separate wires?

I also don't understand why the charger has an output of 24 V if the 2 packs are nominal 14,4 V totally
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Re: About battery in Neato XV-11

Postby vic7767 » November 4th, 2010, 11:55 am

paolostar wrote:I don't understand the 4 wires connection...what are the 4 wires for?
Two wires are for the electrical charging path and two are for reporting the battery pack temperature to the charging system software.

paolostar wrote:I also don't understand why the charger has an output of 24 V if the 2 packs are nominal 14,4 V totally
Similar to a 12 volt car battery, in order to charge it, the voltage has to be higher than the battery rating so most automotive charging systems are 14 to 16 volts.
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Re: About battery in Neato XV-11

Postby paolostar » November 4th, 2010, 2:54 pm

vic7767 wrote:Two wires are for the electrical charging path and two are for reporting the battery pack temperature to the charging system software


Image

I was thinking to use 2 battery packs made of 6 AA batteries Ni-Mh 1,2 V 4800 mAh. This would improve the capacity up to 1/3 more compared with standard batteries.

The relationship between the temperature sensor and the charging system software makes thigs more complicated...
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Re: About battery in Neato XV-11

Postby vic7767 » November 4th, 2010, 5:04 pm

The link I'm going to show here is for a Roomba battery hack but can also apply to the Neato batteries.
viewtopic.php?f=4&t=231
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Re: About battery in Neato XV-11

Postby paolostar » November 5th, 2010, 11:03 am

Making the baterry pack it's very easy. The problem are the temeprature sensors. Is there any picture of them. Are they simply attached to the battery pack? Do the relevant wires go straight to the Neato connector?
If not recovered from the original batteries, where to buy them and which ones?
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Re: About battery in Neato XV-11

Postby vic7767 » November 5th, 2010, 11:10 am

One would have to dis-assemble a Neato battery pack in order to locate the thermistor used for heat detection. Then testing would need to be done using a Multi Meter to measure the resistance values at different temperatures. Then you would have the info needed to order the proper thermistor.
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Re: About battery in Neato XV-11

Postby paolostar » November 5th, 2010, 11:27 am

Ok good, thanks a lot.
If nobody will do it before I will of course await that my Neato battery get broken...
For truth to tell, buying the original spare batteries is not very expensive but for international Neato owners like me the hacked battery could be a solution against the high costs of shipment + taxes + duty.
Or maybe Neato develops a distribution in Europe...
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Re: About battery in Neato XV-11

Postby vic7767 » November 5th, 2010, 12:49 pm

You could also wait until the Neato battery life has exhausted, dis-assemble it, replace the battery cells with similar cells or even LI-ion cells and reuse the thermistor already in the original battery assembly.
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Re: About battery in Neato XV-11

Postby darthvictor » November 6th, 2010, 10:18 am

I got Neato official reply on their battery:

"The batteries should last for one to two years depending on how frequently you use the robot. Thanks for the inquiry."
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Re: About battery in Neato XV-11

Postby vic7767 » November 6th, 2010, 10:51 am

Yes, that's the standard time frame for NiMH cells.
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Re: About battery in Neato XV-11

Postby paolostar » November 6th, 2010, 12:09 pm

Correct...more or less 1000 cycles
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Re: About battery in Neato XV-11

Postby vic7767 » November 6th, 2010, 12:51 pm

The experience that I have with Roomba/Scooba batteries is more in the range of 300 to 400 cycles. Right now it is difficult to monitor the charging process so little is known about charging current and battery temperatures during the charging process inside the Neato which have a lot to do with the overall life cycle of the packs.
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