Battery replacement for preamp

L

luiscesar

Well-Known Member

Oct 19, 2016

39

0

86

Madrid. Spain

• Aug 26, 2017

• #1

Hello dartlovers
My actual batteries no longer last 2 hours on bat-mode
So I think is time to replacement
I've been told that Yuasa NP4-12 is the replacement but also i found a photo on internet with SSB SB5-12.
So any recommendations?

Important, Do i need to do to anything special? Or I simply need to unsold -> sold, and that is?

Thanks
Luis

 

asiufy

Industry Expert/VIP Donor

Jul 8, 2011

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San Diego, CA

almaaudio.com

• Aug 26, 2017

• #2

Hi Luis,

This looks like a perfect opportunity to have your preamp upgraded to the new version, with newer/better batteries (+ other goodies)!
Why don't you contact darTZeel in Geneva and see what can be done?
I wouldn't do anything to the batteries before contacting them anyway...


cheers,
alex

 

microstrip

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May 30, 2010

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• Aug 26, 2017

• #3

As far as I remember the Yuasa was the best choice. However remember that the batteries come pre-charged - IMHO they should only be changed by someone with technical knowledge and in the correct order. And you should have an adequate solder to solder to the battery lugs.

Last time I heard about it there was a long waiting line for preamplifier upgrades.

 

S

Sencha

Well-Known Member

Nov 11, 2013

110

13

323

U.K.

• Aug 27, 2017

• #4

Luis,

Yes, please get in touch with Herve as doing things in the incorrect order can fry the pre amp. Better to leave to a dealer or send back to Dartzeel if you don't feel confident about it.

 

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luiscesar

Well-Known Member

Oct 19, 2016

39

0

86

Madrid. Spain

• Sep 4, 2017

• #5

WOA :O
I didn't know that they need to be replaced in a specific order...

Thank you friends !!

 

L

luiscesar

Well-Known Member

Oct 19, 2016

39

0

86

Madrid. Spain

• Sep 4, 2017

• #6

When I bought the preamp a few months ago I was talking to Hervé and he sent to me all the details of the upgrade, but I thought that the batteries long more than 6-7 months...

 

L

luiscesar

Well-Known Member

Oct 19, 2016

39

0

86

Madrid. Spain

• Sep 11, 2017

• #7

Hi there, I asked Hervé the procedure to replace the batteries, and he kindly sent me a complete pdf
so there is no need to unsold/sold, and no specific order of replacement
only is needed an angled hex wrench to do the job
Althought is "easy" is very very tricky because of the small place of working and you have to put the preamp upside up, upside down, ... and so on... so very care is needed

 

Cascais

Well-Known Member

Nov 5, 2012

257

2

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Portugal

• Oct 19, 2017

• #8

I have begun to use the BTM mode on my 18NS for casual listening which produces surprisingly good results even if the sound lacks the bloom when played in battery mode which of course is preferable. However the advantage of the BTM (or AC) mode is that it constantly charges the batteries which are always ready for serious listening. I find that degree of flexibility satisfying especially since the waiting list for the upgrade with its improved batteries is lengthy.

 

Scott W

Well-Known Member

Apr 20, 2010

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Texas

www.suprahifi.com

• Apr 5, 2018

• #9

Do you have a part # or battery specifications of the batteries you put in?

 

Cascais

Well-Known Member

Nov 5, 2012

257

2

150

Portugal

• Apr 5, 2018

• #10

Scott W said:

Do you have a part # or battery specifications of the batteries you put in?

Click to expand...

Sorry, I don´t have that information but check out "luiscesar"'s post above mine. He has some detailed information about batteries from Hervé and might share the information.

 

Scott W

Well-Known Member

Apr 20, 2010

341

165

1,600

Texas

www.suprahifi.com

• Apr 6, 2018

• #11

I was able to get in touch with Herve. They are NP4-12 batteries.

 

Cascais

Well-Known Member

Nov 5, 2012

257

2

150

Portugal

• Apr 6, 2018

• #12

Scott W said:

I was able to get in touch with Herve. They are NP4-12 batteries.

Click to expand...

That NP4-12 battery seems to be squared off in shape while the batteries shown in the 18NS manual photo appears to be round, although it isn't clear.

 

M

manjy

Well-Known Member

Aug 31, 2011

53

18

913

• May 22, 2018

• #13

Hi All,

I've recently purchased a demo Dartzeel Preamp and I feel the batteries need changing. What's available here are Yucel (Yuasa) Y4-12. Does any one know if these are the same as the NP4-12?
Link: http://uk.farnell.com/yuasa/y4-12/battery-lead-acid-12v-4ah/dp/2083824

 

microstrip

VIP/Donor

May 30, 2010

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• May 22, 2018

• #14

manjy said:

Hi All,

I've recently purchased a demo Dartzeel Preamp and I feel the batteries need changing. What's available here are Yucel (Yuasa) Y4-12. Does any one know if these are the same as the NP4-12?
Link: http://uk.farnell.com/yuasa/y4-12/battery-lead-acid-12v-4ah/dp/2083824

Click to expand...

RS has the NP4-12 in stock - I have bought them from there in the past https://uk.rs-online.com/web/p/lead-acid-rechargeable-batteries/1988068/

Amazon also supplies it in many countries.

 

M

manjy

Well-Known Member

Aug 31, 2011

53

18

913

• May 22, 2018

• #15

Thank you!

 

M

manjy

Well-Known Member

Aug 31, 2011

53

18

913

• May 23, 2018

• #16

Does anyone have the battery changing procedure?

 

M

manjy

Well-Known Member

Aug 31, 2011

53

18

913

• Jun 12, 2018

• #17

I changed the batteries yesterday. It was pretty easy and took me about 25 minutes. The batteries in my preamp were the right side up.
I did however, accidently press 1 or all of the small black push buttons located behind the front panel. Any idea what they are for? The Preamp works fine though.

 

Last edited: Jun 15, 2018