Lipo pack 2 cell at 5.87V. Problems?
 

hello
I forget to charge my 2cell 2000mah lipo pack and the voltage went down to 5.87 V. I tried to recharge it but I got an error on the MRC 989 Super Brain, it says Error Voltage.
Did I hurt the battery?
How can I charge it again?

the pack fell below the 6v(3v per cell) safety limit set by the lipo charge mode. You must set the charger in nimh mode 6 cell at .3 amp.
Charge the pack until it reads more than 6 v....You must watch this step because if the pack gets more then 8.4v you will cause a fire.....
Once the pack is above the 6 volts stop the charge and reset the charger for the lipo pack and charge like normal.

there's ur 1st issue. its specifically stated by most (if not all) lipo retailers to NOT CHARGE with MRC chargers. i know 1 person who has suffered 2nd deg burns and another sans his house b/c of those chargers and lipo. they say they can, they cannot. get rid of it or stop using lipo.

they keep changin/updatin their chargers to try and figure it out. quickly canning the old models after all the issues. play it safe and go another route (ie ICE or astro 109).

R

If you have any hope of reviving the battery, and want to keep your house or whatever, use a balancer for at least the first charge. When you run a lipo all the way down the chances of significant imbalance go up dramatically.

I charge it in NIHM mode as you said, and then switched to Lipo mode, the pack got back to life again.
That was a big fault of mine..
just for the balancer, what you guys recommend?
This pack don't have a plug to balance, but my others pack do.. just in case I want to buy the balancer to be safe.
thanks for all

:lol::lol::lol:
I've never understood the appeal of those MRC chargers myself either? They look so 1984 tech.

can someone recommend a lipo balancer that is compatible with the 989 Super Brain?
thanks a lot :smile:

I am thinking on this one
http://www.electrifly.com/chargers/gpmm3160.html
seems excellent, but I'm newbie with eletronics, therefore someone can tell me if it compatible with the MRC 989 Super Brain?

I also checked
Hyperion EOS LBA10 Network Blancer (6S/10A)

http://thunderpowerrc.com/html/cba-balancers.html
by Thunder Power

Need your advice guys :p

Balance
 

If you don't have a tap to balance it then you won't be able to balance it. I use a astro flight blinky and like it. If you don't have a way to balance it i would watch it while charging and take it off the charger when it reaches 8.4 volts .

The Equinox and LBA10 are the same balancer IIRC, and both are good ones.
Glad you managed to get your lipo back - watch it carefully the next few cycles to be sure there were no adverse efects from the overdischarge.

I have two packs of Protek RC that have a balancer connector, just need to indentify what is the connector type.

http://www.amainhobbies.com/product_...ducts_id/13508
http://www.amainhobbies.com/product_...ducts_id/16869

I also have 1 2 cell 1300mah Pack (no balancer connector) and 1000mah 3 cell

I'm using one of the 3300mah 3S Protek lipos AMain sells and it uses the same connector that Align, DualSky, E-Flight, Electrifly and others use. It is labeled "JST XH adapter". Here's a listing - tap config guide-

http://www.rcaccessory.com/pdf/Batte...on%20Guide.pdf

What i also like about the proteks they can be charged at 2c

I've been safely charging my lipos with a a MRC 977 and the MRC 969(upgraded to a 977) for over a year now. You just have to make sure you are in LIPO mode. That was good that the charger detected that the battery was below the minimum voltage. I would have done the same thing; just charge in NIMH mode a .3 mah once the battery is above 6vdc then stop the charge and continue in lipo mode.

If your battery does not have a balance plug there is no need to buy a balancer. Most transmiter lipos do not come with a balance jack because the current draw is so small that the batteries hardly ever have to balanced.

Not sure about receiver batteries. I believe the excess heat from either engine or speedo may warrant the need to balance the pack.

Commonsenserc sells a stand alone balancer for about $30.00 you just have to find the proper harness to matched the battery to the balancer.


Pass you soon...

The MRC chargers can not change thru a balancer. but if your pack has a balance jack you can alway balance while you are charging or after the charge is done.