Mini-Z, Kyosho Mini-Z Racer, MR-03, MR-02, MA-010, Forums, News, Pictures, Parts, and Shop - Mini-ZRacer.com
Forums, Mini-Z, MiniZ, Kyosho Mini-Z, Kyosho MiniZ, Kyosho Mini-Z Racer
Mini-Z Hop-Ups, Mini-Z Parts, MiniZ Hop-Ups, MiniZ Parts, Kyosho Mini-Z Hop-Ups, Kyosho Mini-Z Parts, Kyosho MiniZ Hop-Ups, Kyosho MiniZ Parts, Kyosho Mini-Z Racer Hop-Ups, Racer Kyosho Mini-Z Parts

Go Back   Mini-ZRacer.com Forums > General Discussion > Batteries, Chargers and Dischargers

Reply
 
Thread Tools Rate Thread Display Modes
Old 2007.03.16, 08:44 AM   #1
Spoon
DCGTG FET Guy
 
Spoon's Avatar
 
Join Date: Nov 2004
Location: Charlottesville, VA
Posts: 3,444
MAHA CH-9000 Wizard One and FujiCell 1000 - Big Problem

I figure with the latest buzz on the forums about chargers and batteries there would be several people trying this combination. I was breaking in some Maha 1000's and I just happened to be near the charger when I heard a short hissing sound.

It took me a couple of minutes to figure out what it was because it smelled like burnt electronics and I was smelling all of my Z's and power supplies to see if I coudl find it.

Turns out one of the batteries in my Maha WizardOne got really really HOT! The plastic on the MAHA chargind bay is deformed and I had to use plier to get the battery out. Most of the damage you see on the wrapper is because it was pretty mcuh liquid when I used the pliers and it deformed when I grabbed the battery.

This was setup on a ceramic tile in front of two fans. The break in prcedure (100mA @ 16 hours) is exactly what fujicell calls for in their data sheet.
http://www.mini-zracer.com/forums/at...chmentid=22153

Attached Images
File Type: jpg maha-fuji01.JPG (60.8 KB, 8 views)
File Type: jpg maha-fuji-2.JPG (85.4 KB, 5 views)
Spoon is offline   Reply With Quote
Old 2007.03.16, 09:01 AM   #2
arch2b
Moderator
 
arch2b's Avatar
 
Join Date: Sep 2002
Location: Washington, DC
Posts: 35,289
Send a message via AIM to arch2b
any guess's as to what failed? have you contacted maha or the retailer regarding a replacement? do you place a fan directly over the cells or just infront of the charger? if it got that hot i doubt a fan on the cells would have made any difference though.

fyi, i ran all my fuji 1k's thru the refresh in my bc-900 @ 200-500 and never got a hot cell. it took atleast 24hrs for the average cycle to complete so i think i may have selected 200.

Last edited by arch2b; 2007.03.16 at 09:03 AM.
arch2b is offline   Reply With Quote
Old 2007.03.16, 09:08 AM   #3
Spoon
DCGTG FET Guy
 
Spoon's Avatar
 
Join Date: Nov 2004
Location: Charlottesville, VA
Posts: 3,444
No idea what failed. I had two fans on the charger. The one on the side of my pit box and a small box fan that I use when soldering (so the wife doesn't think I am breathing in noxious lead fumes).

I actually contacted Maha about another minor issue with the charger. I was waiting for this cycle to finish before I took the pictures (for the other thing). I sent an email to Maha this morning. They are in CA so I don't expect an answer for a few hours at least.

I also did a few sets on the BC-900's with no problems. Probably @ 200. Having 4 chargers going at once is what made me use the box fan.
Spoon is offline   Reply With Quote
Old 2007.03.16, 09:53 AM   #4
arch2b
Moderator
 
arch2b's Avatar
 
Join Date: Sep 2002
Location: Washington, DC
Posts: 35,289
Send a message via AIM to arch2b
it took me over a week to sysle all of my fuji 1k's.

reaffirms my belief that no matter who makes what, there are always going to be issues we all know about the complaints with the bc-900 and i am always skeptical about overly glamorous reviews of competing chargers for the simple fact that not everyone has the same experience with the same product. it's almost refreshing i'm sad to say as it reaffirms my belief that all things being equal, both chargers have the same potential for faults. considering i've had to return a bc-900 already, i'm still happy with it though and i'm sure that while disappointed with this event, you will likely be just as happy with your maha chargers.

sorry, i did not mean this to be yet another comparison. i'll end that discussion here and now.

could you post the support information for maha and keep us posted as to your experience with thier support services?
arch2b is offline   Reply With Quote
Old 2007.03.16, 10:13 AM   #5
Spoon
DCGTG FET Guy
 
Spoon's Avatar
 
Join Date: Nov 2004
Location: Charlottesville, VA
Posts: 3,444
Not to make this a comparison thread...but you are correct. Not everyone's experience is going to be the same with every product. I have been using the Ver 32 BC-900's for almost a year with absolutely no problems.

Getting back on topic

I went through the MaHa website to contact customer support and got a response within 24 hours. I'll post updates as things progress.

I was just about to post a "first impressions" post on 128racing but I think I'll hold off for a few days to see how this gets resolved. I have no doubts that this is a great charger but whatever happens over the next few days will probably help shape my "first impressions".
Spoon is offline   Reply With Quote
Old 2007.03.16, 11:39 AM   #6
Sinister_Y
Registered User
 
Sinister_Y's Avatar
 
Join Date: Jan 2005
Location: Toronto, Ontario, Canada
Posts: 876
Sorry to hear that man. I've been running my 4 chargers non-stop since I got them...seriously. They've been on for about 2 weeks solid now.

I've got no problems so far. I do hear noises from the chargers (like spurts). It's hard to describe. This noise did alarm me at first, but then I figured since all of the 4 chargers did this with all different types of cells, this was normal.

Good luck and keep us posted.
Sinister_Y is offline   Reply With Quote
Old 2007.03.16, 11:46 AM   #7
Spoon
DCGTG FET Guy
 
Spoon's Avatar
 
Join Date: Nov 2004
Location: Charlottesville, VA
Posts: 3,444
Yeah, I think I know the sound you are talking about. I notice it when I first configure the batteries. This was sort of like a very empty can of compressed air. That's actually what I thought it was because I had a very empty can of compressed air in a pile with some other trash.

Are you using the fujicells?

One more question. Do you have any problems with any of the cells seating correctly? On one of my slots the negative tab sometimes "shifts" just a little bit, then it doesn't contact the battery anymore. It's really really subtle.
Spoon is offline   Reply With Quote
Old 2007.03.16, 12:42 PM   #8
Sinister_Y
Registered User
 
Sinister_Y's Avatar
 
Join Date: Jan 2005
Location: Toronto, Ontario, Canada
Posts: 876
I haven't taken delivery of the cells yet. They're sitting at my brother in law's house in Florida waiting for pickup.

No problems with batteries seating, unless you count very snug. They all make a "pluck" sound when extracting them from the charger. It's pretty tight, but I imagine after time, things will loosen up.

The break-in work that you were doing, didn't you just select "break-in" and select 1000mah? When you are referring to 100mah (fuji sheet has 93mah if I'm not mistaken), this is what the charger selected automatically? or did you override somehow?
Sinister_Y is offline   Reply With Quote
Old 2007.03.16, 01:42 PM   #9
Spoon
DCGTG FET Guy
 
Spoon's Avatar
 
Join Date: Nov 2004
Location: Charlottesville, VA
Posts: 3,444
I selected "break-in" and 1000mAH and it automatically selected 100mA. I know it's not exactly 93 mA but it's within a couple of percent. I wanted to check the datasheet just to make sure it didn't have a minimum charge current that was like 0.2C or something.

By the way, here is the response from MaHa

Quote:
Thank you very much for the pictures that you have uploaded. It is safe to say that the charger you have is defective. Right now, I am testing a brand new C9000 that I will be sending to you. So far so good. Hopefully I can get it to you by today if not I will make sure this will go out for you first thing in the morning. Could you please reply back with your shipping address so I can send you the charger and a UPS Return Label for the defective charger? Thanks in advance, I look forward to hearing from you.
Spoon is offline   Reply With Quote
Old 2007.03.16, 02:02 PM   #10
arch2b
Moderator
 
arch2b's Avatar
 
Join Date: Sep 2002
Location: Washington, DC
Posts: 35,289
Send a message via AIM to arch2b
thanks for the update.

just as important to me as the quality of the product is the quality of the support services. even though i had trouble with my first bc-900, the support service was excellent.
arch2b is offline   Reply With Quote
Old 2007.03.16, 02:19 PM   #11
rharris
that Orange car is fast..
 
rharris's Avatar
 
Join Date: Dec 2005
Location: Whittier(LA county), California USA
Posts: 975
Send a message via Yahoo to rharris
Thanks Arch,

Sorry for your trouble, but it's good to know MAHA stands behind the product.
__________________

Come Race with us!!! Club Pics
rharris is offline   Reply With Quote
Old 2007.03.16, 04:04 PM   #12
shuter
Registered User
 
Join Date: Feb 2006
Posts: 387
WOW that battery was really hot. Could have had a fire there. We use so many electronic gadgets every day we tend to forget that they can malfunction with serious consequences. I'm going to move my chargers from the china cabinet shelf to a more fireproof location for charging batteries unattended. There are multiple heat sensing features in the charger, one wonders why the charger did not shut down.

The MH-C9000 does make little noises. I remember reading somewhere what they were but can not racall the explanation or where I read it. I just remember that they were normal and disregard them.
shuter is offline   Reply With Quote
Old 2007.03.16, 04:32 PM   #13
Spoon
DCGTG FET Guy
 
Spoon's Avatar
 
Join Date: Nov 2004
Location: Charlottesville, VA
Posts: 3,444
Quote:
Originally Posted by shuter
WOW that battery was really hot. Could have had a fire there. We use so many electronic gadgets every day we tend to forget that they can malfunction with serious consequences. I'm going to move my chargers from the china cabinet shelf to a more fireproof location for charging batteries unattended. There are multiple heat sensing features in the charger, one wonders why the charger did not shut down.

The MH-C9000 does make little noises. I remember reading somewhere what they were but can not racall the explanation or where I read it. I just remember that they were normal and disregard them.
That's a good point about the heat sensing. Not really sure what happened. Maha is going to test the unit to see if they can figure it out. I typically charge my batteries in front of a fan and put them on top a ceramic tile. It's not really fireproof since it's so close to a wall and could easily flame up and burn down my house (not an exciting thought). I am going to look into something a little safer. There is an unfinished part of my basement that's just a concrete slab, I guess I could charge stuff there...
Spoon is offline   Reply With Quote
Old 2007.03.16, 07:18 PM   #14
arch2b
Moderator
 
arch2b's Avatar
 
Join Date: Sep 2002
Location: Washington, DC
Posts: 35,289
Send a message via AIM to arch2b
i always leave my charger on a 16x16 ceramic tile when unwatched at home. if any of the dc club people want one, i have many more left over from the basement construction.
arch2b is offline   Reply With Quote
Old 2007.03.16, 07:39 PM   #15
shuter
Registered User
 
Join Date: Feb 2006
Posts: 387
Quote:
Originally Posted by arch2b
i always leave my charger on a 16x16 ceramic tile when unwatched at home. if any of the dc club people want one, i have many more left over from the basement construction.
Sounds like a great idea. Where do you get such an item? Home Depot?
shuter is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 12:49 PM.


Powered by vBulletin® Version 3.8.3
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
Copyright 2011 Mini-ZRacer.com
Mini Inferno Sale - Up to $85 Instant Savings!
Micro-T Hop-Ups
RC18R, M18, Micro RS4, Mini-LST, TamTech-Gear, Minizilla, RC18T, RC18B, RC18MT
shop.tinyrc.com Products

more»
Tiny RC Community News
[03/22/17] MZR was on vacation, didn't... : All kidding aside, the host experienced a bit of a server meltdown last week and efforts to restore the site to a new server took longer than anticipated. The current server is temporary until - more»
[11/25/15] Did You Hear? Our Black... : Hey Racers,
We're getting started a bit early with our Black Friday sale this year.  Generally we're not supporters of retailers opening early on Thanksgiving, but in our case, we're - more»
[06/30/15] shop.tinyrc.com: Have You... : Hey All! Just a quick reminder to everyone that we post all of our shop.tinyrc.com Newletters here on the MZR Forum. If for some reason you miss them in your email inbox, you can always see the - more»
Mini-Z, Mini-Z Racer, MR-02, MA-010
M18, M18T, RC18T, Mini-LST, Mini-T, Micro RS4, XRay, 1/18, 18th scale
XMODS, XMOD, Micro Flight, ZipZaps, ZipZaps SE, Bit Char-G, MicroSizers, TTTT, Plantraco Desktop Rover, SuperSlicks, Digi Q
Mini Inferno, Mini Inferno ST, half EIGHT, 1/16, 16th scale
Epoch, Indoor Racer, 1/43, 43rd scale
E-Savage, eSavage, eZilla, e-Zilla, HPI
Robots, Bots, Bipeds, Wheeled, Manoi, Roomba, NXT, Lego, Hacking
Crawling, Crawlers, Micro, RC, Losi Mini-Rock Crawler, Duratrax Cliff Climber
Kyosho Minium, Caliber 120, Minium Forums
Mini-Z Hop-Ups, Mini-Z Parts, Mini Inferno Hop-Ups, Mini Inferno Parts, M18 Hop-Ups, M18 Parts