What's latest version/firmware/model for Maha C9000?

[jayflash]

The 1A pulsed discharge explains some measurement irregularities with some older cells. May I assume the LaCrosse BC-900 & newer 700 also pulses the discharge load?

 

[shelm]

bought mine last month (nov '11) and with this batch: 0K0IA

bought mine this month (jan '12) and with this batch: 0K0GA

( i guess that jdmc's is from a newer batch!! but what exactly does that mean? is his firmware different from mine? )

 

[JudasD]

I just received a C9000 the other day. It is a 0K0IA. Did i win anything?

JD

 

[chewy78]

Did i win anything?

JD

check your pockets

 

[45/70]

As has been mentioned in other C9000 threads, the code on the back of the C9000 is a date of manufacture code, and nothing else. As far as I know, there has been only one revision of the C9000's firmware. This occurred back in 2005, or 2006 and I don't believe there have been any further revisions since. The PCB boards have changed, as well as various other components, but the firmware has remained unchanged for years.

Dave

 

[shelm]

a friend forwarded a recent reply info email to me, which confirms 45/70's statement (thanks!). the message is a little unclear (mostly due to the *** :shakehead English) but whaddya gonna do?

Hi XXX,


Thank you for contacting Maha. The codes in the back are merely lot
numbers which helps us differentiate from shipments.


As I recall, the first batch of shipments had some termination
issues that has long been fixed in our future shipments. The first batch
carried a lot number that begin with 0F. The shipment that we receive today
carries a lot number that begins with 0K and are free from all defects.


Regards,



Eric Cheng

Btw, is lot number a real English word? Couldnt find it in OALD.

 

[bruintennis]

I'll have to check mine when I get home to see what version it is.

 

[jayflash]

The 9000 which I recently purchased allows adjustment by 100mA, up or down, with a 2500mA charging limit. Were earlier models similar?

 

[Mr Happy]

Btw, is lot number a real English word?

It's two words. "Lot" being "a number of units of an article" or "a group of things" in this usage. "Lot number" is therefore the number of a particular lot, or unit of production.

 

[shelm]

Thanks Mr Happy for the explanation! Now i am thinking that the Maha email makes some sense. Finally. Happy myself

that is good news for all buyers who got a lot number other than 0F???, i.e. the good ones are 0G???, 0H???, 0I???, 0J???, and 0K???.

 

[shelm]

The 9000 which I recently purchased allows adjustment by 100mA, up or down, with a 2500mA charging limit. Were earlier models similar?

SilverFox wrotehttp://www.candlepowerforums.com/vb...ger-Comparison&p=814177&viewfull=1#post814177 in 2007:

4/5/07 I have also added the results for the Maha C9000 Wizard One charger/analyzer. The original version had some issues with termination and has been superseded by the improved version. This unit is giving the BC-900 a lot of competition, and offers a lot more flexibility.

You have to program each slot independently, and have charge rates ranging from 200 mA to 2000 ma in 100 mA steps, and discharge rates ranging from 100 mA to 1000 mA in 100 mA steps. You can use the Refresh/Analyze function to charge/discharge/charge your cells with a read out of the capacity on a large back-lit display. You can run up to 15 cycles selecting the charge and discharge rates you want. You can do a discharge only. This function even works with Alkaline cells, but is not recommended.

 

[JudasD]

The 9000 which I recently purchased allows adjustment by 100mA, up or down, with a 2500mA charging limit. Were earlier models similar?

2500mA limit? Are you sure it's not 2000mA?

JD

 

[shelm]

the limit is 2000mA, i've checked my printed 2011 manual and also the apparatus itself. i cant go higher than 2000mA.

errare humano est

 

[jayflash]

2500mA limit? Are you sure it's not 2000mA?

JD

My mistake, thanks for the correction.

 

[JudasD]

My mistake, thanks for the correction.

No worries. i was just making sure in case there was a new version

JD

 

[45/70]

The 1A pulsed discharge explains some measurement irregularities with some older cells. May I assume the LaCrosse BC-900 & newer 700 also pulses the discharge load?

Hey Jay, meant to address this earlier. As I recall, the La Crosse chargers run a pulsed 500mA during discharge. This lower rate does lead to them to giving more optimistic capacity results, when compared to the Maha.

Were earlier models similar?

The biggest difference in the one and only firmware upgrade to the C9000, was that the maximum charge was limited to 4000mAh, instead of 20,000mAh (not so good for charging D cells via adapter), and I believe the 1hr/2hr wait times were changed, I forget how though. There may have been some other minor change, as well. My memory is fading.

Unrelated to the firmware update, but occurred at the same time, was the LCD back light was changed from a 10mW LED to the now famous 50 Watt HID.

Dave

 

[bruintennis]

Recieved mine today: 0K0GA. I'm so happy :laughing:

Mine is same OKOGA. Purchased 1/2012.

 

[Schermann]

About two weeks ago I purchased my C9000 based on the advice on this forum. My lot code is 0L0EA, that being the Australian designator of the latest firmware to date. It does everything it's supposed to do without any of the past issues, at least so far. I am a little frustrated by the HIGH voltage rejection value of < 2.0001 volts but then again the dumb slow charger 250ma that comes with a 4 pack of Eneloop AA's deals with that after a 100ma MH discharge. The C9000 is fun the play with and who said "as boring as watching batteries charge"!

 

[NeoLoop]

Today I bought MH-C9000, the production code is 0M0EA, unfortunately in Indonesia, I only got 1 year warranty. I had complain to MAHA Energy in USA & Thailand & Indonesia of course, they said that depend on policy distributor each country. Even in upside box they put sticker "Garansi Resmi 1 Tahun" translated : 1 Year Official Warranty but inside the box the english manual printed Three Year Limited Warranty. So shame, the big company MAHA Corp. can not made universal warranty so they made customer unsatisfied & doubt about the quality & specification of product that market in Indonesia, even MAHA Engergy Technical support make sure there are identical product. As customer that bought with the same price ~ $60 (to be frankly that is very expensive price its a much of money) and only got 1 year warranty when something happen on second or third year, so I must spent more money for repair that should have been free of charge, I'm very disappointed. Beside that, the discount warranty up to 66% (I only got 1 Years) is make me & i'm sure other customer become JEALOUS & SUFFER a FINANCIAL LOSS. The reason about different policy depend on distributor doesn't make a sense, it is something wrong :thinking: that i can't accept in my mind. This is not only happen on this case, other ex. like computer motherboard GigaByte (5 Year warranty) & other electronic that import form other country Indonesia distributor or importer always put BIG discount up n remain only 1 year :thumbsdow. I don't know whats wrong with kind of policy. Hmm... I just pray n hope nothing happened in next years. Oh... I'm a little glad that i got new batch 0M0EA, because other shop their stock remain 4 unit all is 0L0BA (Feb 2012)--> Hahaha is not easy for sell expensive product in Indonesia that not so interesting example like this charger unit. Like you see today is Oct 2013, so that unit is stay overnight ups over year . I tell this fact, I hope MAHA & other producer can open they eyes for customer satisfy.

 

[ChrisGarrett]

Somebody needs to switch to decaf and take the blue pill.

Chris