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Thread: Would you leave the Maha Powerex MH-C9000 unattended???

  1. #1

    Default Would you leave the Maha Powerex MH-C9000 unattended???

    its been said to NEVER leave batteries charging unattended (fire risk)

    i own this,

    http://www.batteryjunction.com/vav10baysmch.html

    im thinking about getting the Maha Powerex MH-C9000

    http://www.amazon.com/Maha-Powerex-M.../dp/B000NLUSLM

    after reading some reviews, although it can do a lot, id rather use a simpler charger, i just want my cells charged fully and safely, i dont need or want to read any numbers.

    is the la crosse BC 1000 as good but more simple to use then the mh-9000?

    or is the charger im using actually 'ok' ??

    i like and use a lot of rechargeable AA and AAA cells (family, toys,flashlights)

    is this thing worth a look?

    http://www.batteryjunction.com/titanium-md-1600l.html
    Last edited by waddup; 10-26-2011 at 09:03 PM.
    If and when the the big dookie hits the fan, and global chaos ensues, i want a couple of quality AA lights within reach.

  2. #2

    Default Re: Would you leave the Maha Powerex MH-C9000 unattended???

    At times and using some of it's features, you must leavt the 9000 unattended. Coditioning can take 2 days depending upon the size cells you're using.
    I've had one for several years and leave it unattended quite often.

  3. #3
    Flashaholic* Wrend's Avatar
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    Default Re: Would you leave the Maha Powerex MH-C9000 unattended???

    It's very easy and intuitive to use and cycle through the hand full of options and change the rate and capacity fields.

    If you have no understanding of how to properly use rechargeable cells, then learn, or just waste your money on primary cells or rechargeable cells that don't last as long as they should.

    That aside, you can just put your battery in it, and it will charge it.

  4. #4
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    Default Re: Would you leave the Maha Powerex MH-C9000 unattended???

    Quote Originally Posted by menoceros View Post
    At times and using some of it's features, you must leavt the 9000 unattended. Coditioning can take 2 days depending upon the size cells you're using.
    I've had one for several years and leave it unattended quite often.
    I agree, I've had mine for about a year.

  5. #5
    Flashaholic* Black Rose's Avatar
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    Default Re: Would you leave the Maha Powerex MH-C9000 unattended???

    I've had a C9000 for several years and have left it unattended many times, especially when doing break-ins.

    I still take the same precautions with it that I do with my li-ion chargers, except that I don't leave my li-ion chargers unattended.

  6. #6

    Default Re: Would you leave the Maha Powerex MH-C9000 unattended???

    You already have a smart charger that charges slowly, and has maximum charging timer control to protect against overcharging (even if -deltaV detection is missed as some will debate here). For a family with kids, what you have is a good choice. That is, safety over having the best battery charging tool to optimize the life of the batteries.

    The faster the charger, the higher the temperature.
    Titanium MD-1600L Ni-MH AA/AAA Smart Fast Battery Charger
    http://www.candlepowerforums.com/vb/...AAA-AA-charger
    You will read concerns about not detecting when a cell is charged due to the low current.
    However, the specifications also indicate a Fail Safe Timer & Thermal Protection Charge Termination. On paper the charger looks good.
    The bad part is a lack of user reviews on this charger.
    Last edited by rcozer; 10-30-2011 at 02:16 AM.

  7. #7

    Default Re: Would you leave the Maha Powerex MH-C9000 unattended???

    I leave mine un-attended too, I really cannot figure out how you can keep on monitoring it when it's doing something like a refresh or break-in which can easily take up to 38 hours.

  8. #8
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    Default Re: Would you leave the Maha Powerex MH-C9000 unattended???

    I leave it unattended all the time. It's a safe charger and IMHO even with the LiIons and a quality charger there is little risk. How many laptops, cell phones, etc are unattended charged every day without issue? Not much to worry about especially with charge rates approaching 4+ hours and a charger that terminates properly. That is the thing, you need to have a quality charger

  9. #9

    Default Re: Would you leave the Maha Powerex MH-C9000 unattended???

    Back to the original question, that is to find a simple charger, what do you guys think if the sony quick charger ? It got pretty high ratings:

    http://battery-charger-review.toptenreviews.com/

    Even beating out maha.

  10. #10
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    Default Re: Would you leave the Maha Powerex MH-C9000 unattended???

    Quote Originally Posted by waddup View Post
    its been said to NEVER leave batteries charging unattended (fire risk)
    the china 10X:
    I own a very similar model of charger, as in made probably to the same specs, as that, slower 10X charger you have, I like it very much. If i discharge before charge using eneloops , it does a very nice charge on them. I can also use it for topping by manuel control. It can be nicer on AAAs, with its lower rate.

    the Maha C9000 is good for testing, it would work well as "the other charger" to the one you have. It can do faster charging, still cooler, and can test.

    the titanium is very cool, with the 16 at a time, it is not a testing charger. There are many reports of "part of" it failing. knowing about how they are built inside, the reports I have seen are on par for other cheap 4X chargers. IMO i would rather have more 4X chargers than to have a 16X with only 12 of them working to 100%. If its build quality had proven to be MUCH higher , i might have given it a shot. But then again, I have the 10X (like yours) and it is pretty sweet.

    I Pretty much have to sleep, when the c9000 is doing its thing. with the lacross 900 it destroyed (perfect) batteries and itself from a microcontroller lockup,while I was not looking. The c9000 has an added voltage termination method, helps some, and refuses crap cells completly. IMO it can be more "safe" safe being relative.

    take them all, any one of them, and the thing to have to "pay more attention to" is AAA charging.

    the Maha 808, and its methods, should have also been 100% safe, and I like its methods also. For a few people it was not, it will charge a crappy cell, and a cell could possibly take it out. but the 9000 wouldnt even start charging with that same cell, its too damn pickey about high resistance cells.
    Last edited by VidPro; 03-05-2013 at 07:24 AM.

  11. #11
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    Default Re: Would you leave the Maha Powerex MH-C9000 unattended???

    Quote Originally Posted by waddup View Post

    I have that one and have for around a year now. It works as advertised and charges batteres in what seems to be fully. I really like it as I've got a TK45 that takes 8xAA so I can charge 2 sets at a time. And charge iPhones and other USB devices. Highly reccomended.

  12. #12
    Flashaholic InHisName's Avatar
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    Default Re: Would you leave the Maha Powerex MH-C9000 unattended???

    I parked mine on an empty metal paint gal can. Monitored for a couple of weeks, then slacked off.

    Now hardly monitor squat with my C9000. It was still on the can thru this Christmas, After 5 Years, its direct on the workbench. Still going fine.

  13. #13
    Flashaholic*
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    Default Re: Would you leave the Maha Powerex MH-C9000 unattended???

    Yes sir, do it all the time plus overnight!
    chiphead

  14. #14
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    Default Re: Would you leave the Maha Powerex MH-C9000 unattended???

    Yes, because of the break-in cycles, I leave it unattended. I did a lot of research on this charger before I purchased mine. Even the middle slots only get a few degrees warmer than the outer slots (which don't seem to warm up over ambient air temperature ), makes me believe this is safe to leave it unattended.

  15. #15

    Default Re: Would you leave the Maha Powerex MH-C9000 unattended???

    I've had my MH-C800S for over a year and leave it charging unattended all the time. Never a problem.

  16. #16
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    Default Re: Would you leave the Maha Powerex MH-C9000 unattended???

    Overall the recommendation is to never leave a charger that is charging unattended.

    That still stands.

    However, if you run extended testing like the "Break In" on the C-9000 you will have some time where you are sleeping and the charger will be left unattended. If you are going to leave the charger unattended do some preparation to remove flammable items from around the charger. Set the charger on a tile or something else that can handle warmer temperatures. This way if things go bad you will contain the damage.

    Another item that will give you piece of mind is to have a smoke alarm near your charger.

    Usually things progress without problems, but it is always good to be proactive and prevent problems before they happen.

    Tom
    Behind every Great man there's always a woman rolling her eyes...

    Most batteries don't die - they are tortured to near death, then murdered...

  17. #17

    Default Re: Would you leave the Maha Powerex MH-C9000 unattended???

    For some reason these types of chargers tend to have more cation applied to them than other devices. Maybe it's from horror stories read here. Maybe it's the user abusing batteries or using a modified charger. Maybe those "$0.99+shipping chargers" aren't safe in general. Who knows.

    But I leave my electric toothbrush (NiMH) plugged in 24/7/365 and I don't think anyone worries about those. Same with my electric razor/trimmer that is used daily; that's been fine over the past 4 years (NiCad I believe). My laptop goes days or weeks plugged in (I know I shouldn't do this for performance reasons).

    In the end, I leave them somewhat unattended in the sense that I'm always home. I don't feel safe leaving home for some reason.
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