PowerEx MH-C9000 WizardOne Charger-Analyzer
by Maha Energy Corporation
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Digital Photo Product Details
Manufacturer: Maha Energy CorporationModel: MH-C9000
Product features:
- Four independent slots for AA or AAA NiMH batteries
- Large backlit LCD
- Digitally displays battery capacity, voltage, current and time
- Special forming charge and cycling mode
- 30 selectable charging and discharging speed
Digital Cameras Photo Reviews of PowerEx MH-C9000 WizardOne Charger-Analyzer
Customer Review: A powerful, versatile AA/AAA battery charger-conditioner-analyzer
Summary: 5 Stars
No doubt about it: the Maha Powerex WizardOne MH-C9000 is a commanding AA/AAA battery analyzer, charger &/or conditioner with few drawbacks in my opinion. It will take on any combination of 1 to 4 rechargeable AA &/or AAA batteries, allocating separate charging current circuitry for each cell. This charger performs its functions quite well & with consistent close tolerances at that. There are few drawbacks to be aware of with this battery charger. There are already several detailed reviews published here, such as NLee the Engineer's review "Showdown: Maha MH-C9000 vs. La Crosse BC-900" (please consider taking the time to read it if you've not done so already). Here are some of my feelings as well as observations on this valuable & flexible battery charger. As with my review/thoughts on the La Crosse BC-700 charger, IF this review is too long for you THEN please consider scrolling down to the end of this review for my bottom line(s).
The Maha Powerex MH-C9000 is about the size of a decent deli sandwich... a tad bulky but still portable enough for many situations. Among its many valuable assets are the generous spaces between the charging compartments. This, naturally, helps to dissipate heat as charging occurs... not a problem at lower charging currents, which will help your rechargeable batteries to last longer, but at the higher current capabilities of this charger (up to 2 full amps for each cell, if you really want/need it) the extra spacing is a real asset. This also makes it much easier to extract batteries from compartments #2 & #3 when having 4 cells in the charger at once.
This multipurpose battery charger is plenty sturdy & will even perform a discharge function without recharging the cell(s) afterwards if you'd like. Now that is something the La Crosse chargers won't do & could come in handy, for instance, with NiCAD batteries that you wish to store for whatever reason, as it is commonly recommended that NiCADs should be stored in a discharged state while NiMH batteries are best stored charged. Additionally, there are 4 other modes to choose from: Charge (fastest & easiest), Refresh & Analyze (charge-discharge-charge with battery capacities displayed upon termination), Break-in (follows the IEC standard procedure in determining cell capacity, taking 39 to 45 hours to complete) & Cycle (the same as Refresh & Analyze except you can charge-discharge up to 3 consecutive times with a final recharge).
AA batteries are placed into the MH-C9000 positive tip first. AAA cells are inserted negative side first. After the programmed bulk charging has been delivered, the charger will then top-off charge @ 100 mA & then settle into a 10 mA trickle charge. The backlit LED display will alternately show, for one cell at a time, the approximate charge/discharge progress during operations, the charge/discharge rate itself, elapsed time (in minutes) & cell voltage... twice each per cell before moving on to the next battery's readings. It also boasts a worldwide power supply, though items such as the 12-volt connecting cord/plug are extra cost & not all vendors carry them. Along with our two C-9000 chargers, we ordered two Powerex 12 volt plug-in cords from 17th St. Photo listed here @ Amazon.com, which Maha states you must use in order not to void their fine 3-year warranty for these units.
One can choose to program charging currents from 200 mA all the way up to 2000 mA for each battery & discharging currents from 100 mA to 1000 mA. Maha recommends that charging currents of not less than 0.3C (30% of the cells rated capacity) or more than 1.0C be employed when using this charger. Too low of a charging current may prevent the negative delta voltage detection from operating optimally, the cell's charging possibly not terminating properly in this case (though we commonly charge our Sanyo eneloop hybrid NiMH batteries @ just 0.2C with no problems whatsoever thus far). Charging at too fast of a rate may damage the batteries. The maximum recommended discharge rate is 1.0C.
Programming the MH-C9000 may seem unnecessarily wearisome until you realize that if you hold down a button while programming then the choices will continue to cycle up or down the list.
*TIP*- The very moment that the choice JUST BEFORE the one you desire is displaying onscreen while you are holding a control button down then release the button at that time & the setting you want will be selected... then simply press "Enter" afterwards.
Example 1: You have placed 4 cells into the charger & want to discharge each @ 200 mA (the cell you are programming will have an indicator displayed under it). Within 10 seconds of inserting all 4 batteries, depress & hold the "Up" button, which will then display the "Cycle" option at the bottom of the display list. IMMEDIATELY lift the button & you'll have the "Discharge" function displayed, then press "Enter". Next, select the discharging current for this cell by depressing & holding the down button. When the display first shows 300 mA, lift & you'll be at the desired 200 mA. Again, press "Enter". Do this for each battery in turn. Total button depresses: 4 for each cell, 16 for all 4 cells... very easy as well as plenty fast enough (far less than one minute for programming all 4 batteries). When you get the hang of this then it's a snap, though it sure would be great if one could program all four batteries simultaneously as with the La Crosse chargers.
Example 2: You have placed 4 cells into the charger & want to "Refresh/Analyze" each @ 400 mA charging - 200 mA discharging currents. Within 10 seconds of inserting the all 4 batteries, press the "Down" button once & you will have the "Refresh/Analyze" function displayed, then press "Enter". Next, select the charging current for this cell by depressing & holding the down button. When the display first shows 500 mA (initially descending from 1000 mA) then immediately lift & you will be at the desired 400 mA of charging current. Press "Enter". Next, in selecting the discharging current, press hold the "Down" button again until 300 mA is displayed (initially descending from 500 mA) & immediately lift & you will have 200 mA selected in the display. Press "Enter". Perform this sequence for each cell. Total button depresses: 6 for each cell, 24 for all 4 cells.
Example 3: You want to recharge 4 fully discharged 2500 AA NiMH reasonably fast. Simply place them into the charger & do nothing, as the default programming current of 1000 mA will automatically engage. In about 3 hours, you'll have your batteries ready to go again. Simple as can be!
Annoyances are few with the MH-C9000. These will bother some more than others:
* The backlit display screen is plenty bright & readable IF you are about 15 degrees or so below it from viewing it straight on. Just for fun, try viewing the screen with Polaroid sunglasses on. It's like Haight-Ashbury all over again, if you know what I mean. If you view the screen at a 45-degree angle from below while it's working then it is quite difficult to read until you lean over up & over it. In this regard, though not backlit, the La Crosse BC-900/700 charger's display screens are quite a bit more readable at various angles. In addition, having the option of switching off the backlight of the C-9000 would be handy.
* The instructions are not a manual but are an unfolding sheet of paper of about 12" x 18"... passable, but a bit disappointing somehow. Having put down about $60 for each charger, a regular flip-through manual would be much nicer. The instructions are adequate, however, & are illustrated well.
* Before it performs any function, the charger will perform an impedance test on each cell & display "HIGH" if a cell fails this test, no further operations resulting. The instructions state that if this reading is thought to be in error then a "Discharge" may first be performed. However, having tried this with 2 older, rejected cells, the charger will still not continue & the program is concluded, displaying "HIGH" once again.
* The time part of the display would be much better if it would display elapsed time in hours & minutes instead of just minutes in my opinion.
* Maha informs that you may hear an audible hissing sound as the charger performs. This is normal, though thus far this has not yet been heard here. As noted by other reviewers, this may only be at higher charging rates than we are using.
Thank you for spending the time reading my review. Being a brain-injured veteran, writing my thoughts are helping me to heal as well as providing me with something useful & helpful to do. It takes quite a while for me to create a review & it's worth every hour it takes... over 6 hours in this case. It's all good.
BOTTOM LINEs- Certainly the Maha Powerex WizardOne MH-C9000 is the finest, relatively affordable AA/AAA battery charger-conditioner-analyzer presently available to us common folk. It takes less than a minute to fully program 4 batteries identically once you get the hang of it. Its versatility & power make it a great choice for most applications. It may reject your older rechargeable batteries as being too high in impedance/resistance, but by using newer, premium-quality NiMH cells (such as Powerex, Sanyo, Sony, Titanium, etc.) then this should present no problem whatsoever. Its independent charging circuits will perform balanced operations on your investment in rechargeable batteries & will more than pay for itself over time... especially if you continuously use as many AA & AAA batteries as we do. The 3-year warranty is top-shelf & its power consumption is quite reasonable, as a C-9000 performing charging/discharging operations 24/7 for a full month will consume about 2 kWh of electricity while charging @ 400 mA & discharging @ 200 mA. In writing well over 100 reviews for various products at many websites over the last 6 years, this is only the third product to earn my 5 star rating, the minor annoyances & irritations not being enough to shave off so much as ½ of a point in my opinion. You will likely have no trouble programming this amazing machine as well as be pleased that you invested in it.
Description of PowerEx MH-C9000 WizardOne Charger-Analyzer
MH-C9000 WizardOne Battery Charger & Analyzer is suitable for the casual consumer users, enthusiast and professionals, WizardOne is capable of charging, conditioning, analyzing, cycling, forming and discharging one to four AA or AAA batteries, all while digitally displaying the battery capacity and voltage. All four slots can be operated independently in different modes and settings. Those seeing the unit for the first time will be struck by its large LCD screen, backlit by ultra-bright white LEDs. Measuring over 3.5" by 1.5", the display is more than three times larger than its closest competition and shows a wealth of information that is easy to read. In addition to the standard charging, conditioning and discharging, the WizardOne charger-analyzer also offers two unusual operations modes. The "Break-In" mode allows the user to input the capacity of the battery and performs a "forming" charge designed to properly break-in new batteries. The "Cycle" mode allows user to charge and discharge batteries consecutively while storing the capacity for up to 15 cycles. There are ten selectable charging and discharging current from 0.2A to 2.0A and 0.1A to 1.0A respectively. The charger also features four independent temperature sensors using Maha's latest temperature rise detection algorithm in addition to the usual peak temperature detection. It also armed with additional patented termination algorithms found in other Maha chargers. The unit can be operated in a "basic" and "advanced" mode. In the basic mode, user merely needs to insert the batteries with no further key press. The charger will select the appropriate settings automatically, making it suitable for the casual users.Products
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