I have been chargeing at 150 watts total at times. It will charge 2 - 10 cell batts at 5 amps as long as the input voltage is high enough.

i have the mrc 969 and want to upgrade the software.my question is,do i just send it to them with a note saying i want to upgrade the software?please someone rely quick.thanks.

I sent mine back for the free upgrade a while back with a note that I want to use the charger for lipo's and nicad batterys. I also asked for the new operating procedures. MRC paid for return shipping and included the instructions, it took a little over a month to get the charger back. You only need to send the charger, not the cables or power pack. I have charged 2 and 3 cell lipo batterys with no problems, the charger shuts down and beeps when the charging is complete, seems to be a good system after a very poor start.

thanks for the heads up bro.i defanatly will do that.its about time i pull this charger from my shelf and blow the dust off of it to be revived.

I sent mine in and they did the work, but sent me no instructions. Is there a PDF around anywhere??


Ray

thats a good question.now that you tell us of your delema,it would be a good idea for someone that does have the new featured instructions to list it here in this thread. 'ANYONE'!!!!!!

i just sent mine out today.hey ray,i know someone has mentioned on here about getting it back around 1 month or so.how long did it take to get yours back?

man,i know i'm going to be happy with it once i get it back but i'm going to be bored for a long while since it is my only charger right now.[&o]

total turnaround time was about a month. Quicker than I had expected.

I just tried my li-po function and to get to it you have to input the number of cells with the batt hooked up and then verify that it says li-po on screen. I can try to scan instructions and post them if that is legal?

ya,we defanatly need this information up on here.specially since they are returning chargers back with no further instruction for the new updated features.

MRC posts PDF instructions for all chargers except the 977. I'm going to email them to see if they will add it to their list.

UPDATE: I emailed them and requested that they post the instructions with the others at:


http://www.modelrectifier.com/resour...ryChargers.asp


I'll post again if/when I hear back from them

I got a response today in my email from John at MRC. I was told that they are "working on" putting the instructions on the website, and that he will mail me a copy right away as well. Next day service, not too bad!

I mentioned in my original query to MRC that "Many of us at the RC forum I frequent have and use the 969, and many of us have had the upgrade service done...however, few if any of us have received the new instructions." So, an email to MRC would seem to be the ticket for anyone who needs a copy.


Ray

I got a letter in the mail today from MRC. It included the following note:

"Your charger has received a complimentary upgrade. We have increased the charge rate to 5 amps for Nickel Cadmium and Nickel Metal Hydride cells. The discharge has been increased to 4 amps. The lithium charging circuitry has also been upgraded.

DO NOT USE this charger without thoroughly reading the instructions for Lithium batteries as circuitry has been changed. Always take care when charging any battery especially Lithium polymers."

It included a copy of the regular 969 instructions, with the "upgraded" lithium instructions. I made a PDF of just the Lithium instructions, which you can find at:

http://www.westernallegheny.com/foru...69upgraded.pdf

if anyone needs anything else from the instructions, just let me know.


Ray

I recently purchased this charger (mrc 969). It came with a slip indicating it had the charge/discharge and li-po circut upgrade. I purchased this charger specificaly so I could charge my li-po packs for my 18th scale cars. Is this charger safe with the upgrades? I do have a li-po specific charger also but I wanted a charger that could charge ni-mh packs too for occasional 10/th scale racing. I wish I read this thread before I made my purchase!!

I've used mine without trouble since the upgrade. There are definitely easier li-po chargers to use, but the 969 works fine.

The li-po specific charger that I have now only charges at pre set amp rates and I got the 969 so I could adjust the charge rate to exactly 1C, also charging 2 packs at once would be a time saver too. My main concer is safety,,and these batterys arn't cheap to replace!! So is the "upgraded"969 the same charger as the 977??

Yes, as far as I can tell the upgraded 969 is identical (except for the included power supply)

Yeh,I have the Super Brain 969 and works great on nicd's and nimh but would like to upgrade for lipos. I'll call MRC tomorrow
for futher instructions. Thanx to all you guys for bringing this hazard alert to every one's attention.

can anyone explain clearly to me how to discharge batteries with the 969 please ?
i was told to discharge the batteries i need to disconnect the power source and leave just the battery pack plugged in, is this correct ??
not using lipos, just standard 5 cell hump packs on my fg truck.
help will be greatly appreciated.

Thanks
Eric

That may draw the battery all the way down, but is not the proper way to do it. It is explained in manual.

Hook batt up to channel A and push discharge then start for a 3 amp discharge. You can also change the rate the same as you do on the charge if desired.

[>:] junky

I purchased the MRC 969 about 2 years ago, I am pretty sure that it included a slip saying the upgrade was done, it charges at 5 amps and discharges at 4. Does this mean it was upgraded? Also the fan makes a horible noise when it starts up sometimes, but I just tap it and it sounds ok, anyone know if it is okay to replace it with a computer fan?

Yes, it is upgraded. No guarantee if it is lipo though. You'd have to verify that part of the upgrade.

I BOUGHT A 969 SUPER BRAIN FROM TOWER HOBBY ABOUT 3 YEARS AGO AND IT'S BEEN A GREAT CHARGER FOR NICADS AND NIMHD BATTERIES!! I JUST RECENTLY BOUGHT A LIPO 11.1 ,1350MAH, 3CELL FOR MY HELI!! I ALSO PURCHASED A EQUINOX LIPO CELL BALANCER FROM ELECTRIFLY TO USE IN BETWEEN CHARGER!! I HAVE CHARGED THE LIPO ABOUT 20 TIMES WHEN IT REACHES ABOUT 10.5 V USING THE COMBINATION ABOVE!! I HAVE NOT HAD ONE PROBLEM, LIPO TAKES APPROX 1 TO 1.5 HRS TO CHARGE AND IT IS NOT EVEN WARM TO THE TOUCH!! I ALSO AM KEEPING A CHART ON MY CHARGING, READINGS BEFOR, AFTER AND CELL BALANCING!! IT ALL HAS BEEN PERFECT!! THE ONLY GLITCH I'VE EXPERIENCED IS WHEN THE LIPO IS FULLY CHARGED, AROUND 12.5 V, THE CHARGER READS "ERROR" IN THE TEXT, BUT LIPO READINGS ARE PERFECT!!!
96ROUSH

thumbs up for towerhobbies.com! always had a great time buying from them..