mrc 989 and hyperion lba10
 

i searched for a while and could fine the info i was looking for so here it is

#1)is this hoodked up right for charging with the balancer

#2)is it set up properly to charge 2s lipo with 5ah packs, besides not having a plug for pack,


#3)is the amp setting right

just a few to get this thread going, ill post all questions about this combo and any charging ? i have in the future

1. It appears to be setup correctly
2. Same as above
3. The amperage should be 1C which for a 5000mah pack, would be 5 amps, not 1 amp. That is only .2C

ok , thanks alot just new to this electric, so im trying to learn as much as possible, dont want to ruin the batterys, and i didnt get much out of the instructions that mrc provides, thanks again

No problem.

I plan on running this exact set up very soon. So, from what it looks like, you will be balancing and charging at the same time? Let us know how it works for you...

Thanks

charged thru balancer and worked great , still charging but im at 1 hour and 4ah (only charging at 4 amps instead of five) , is this slower than charging w/o balancer then balancing when charged? or is this the prefered safe method, thanks

just finished, it took like 72 min and ended up at 8.42v and 4660 mah, guess i drained that 5ah a little to much, do these #s seem right?

Charging through a balancer will only take longer if any cells have to be balanced because it does place a small load on the high cells. And the LBA10 seems a tad sensitive so it balances more often. However, the load the LBA places to balance is relatively small and should not affect charge time too much (maybe 30 seconds) unless charging lower capacity cells.

BTW: Those numbers seem fine to me...

thanks brianG , just finished pack #2 and a 5 ah pack that started at 6.9 is at 8.25 and it took 4900mah, is that mean its a good pack? also do any of you let it sit and trickle charge? or is it not worth the time ,thanks for the help

NP.

By tricke charge, do you mean the CV stage? It does add some Ah into the cell so I would keep doing it.

The starting voltage of 6.9v seems good. It's probably a little lower right after a run, but it drifts back up and that number looks fine. If you discharged deeper (NOT recommended), you'd probably be charging closer to 5Ah back into the pack.

oh ok, yeah with my charger (mrc989) when its done it goes into a trickle mode , next time ill let it go , and maybe charge at 1c instead of less(4amps), should help shorten the charge cycle alot

Well, trickle charge is like a cycle, it'll discharge and recharge if I'm not mistaken...I would not recommend it personally. I never let it trickle. Trickle charging I thought was more for NiCd batts or Nimh to cycle them....but not sure

It could simply be the CV phase newe.

Most Li chargers charge at CC until the pack reaches 4.2v/cell, and then switches to CV until the current drops to a low value.

Not sure, I'll have to read the manual again. But with mine, the volts reach 16.8 or something with 8100 almost of mah, then goes to trickle automatically, so I take it off at that point.

EDIT: ok, after re-reading the manual, you should let the charger trickle charge the lipo. Sad thing is, i always stopped it before that! OOPsss, maybe I'll get more of a punch with a full charge! LOL

There's no need to keep the battery on the charger after the CV phase (once it has reached 4.2v/cell). The extra runtime gained from the next phase isn't that much, maybe a couple minutes (depending on total runtime). Punch would likely not increase, since punch is a function of the cells' resistance and their temperature.

I see, that makes sense. But I was curious because it only took 6900 mah this time? When I charge on my Hyperion, run the batts, and charge again, it takes almost 8100mah....so I was wondering if I actually got the full charge by disconnecting through CV phase on the 989....

Depending on the battery type, you can gain a substantial amount during the CV stage. My emolis take about 20% of the total charge during CV, but my 8Ah maxamps lipos only take ~8% of the total charge. I hear the A123 cells take even less during this phase (which is apparently why the lipodaptor works well with them).

The A123s don't even have all that much of a CV phase. If you were to see a charge graph of the cells, you'd see that after about 3.65v the voltage climbs faster and faster.

I've thought about it, and it seems that the higher C Lipo batteries (lower resistance) require less time in the CV phase because of their lower resistance - with a given amp draw, the voltage of the cells increases less than a lower C battery, allowing the battery to take in more energy before hitting the 4.20v mark.

Yeah, not that I think about, I think you (MM) were the one to tell me that about the A123's. I think it was during a discussion about the merits of the lipodaptor and the fact that it skips the CV stage...

well my charger just shut off while charging and i checked V of each cell and one was 4.02 and the other was 3.92,it stopped because it is out of balance, and it didnt go to trickle, so now i am trying to balance stand alone - and only one cell light is on ?? this is right , right?? should the statis light be blinking or solid??

i want to get this charged , so i need to get it balanced first right?

also i have the balance and deans plugged in is this the right way to do this, i seem to have thrown away the paperwork that came with the lba10, thanks

oh and when i got my new pack maxamps said i should be charging and then balancing before recharging, anyone know if it matters?? i have been charging thru the balancer and seems to be great

still having issues with one battery, any help with the balancer lights??

i think it is just out of balance , cause the charger starts and goes for awhile then stops???

Here's the manual for the LBA10...

If your cells are that out of balance, it could take a LONG time to equalize with just the balancer. The balancer is going to apply a small (150mA IIRC) on the high cell(s) to get them down to the same level as the lower one(s). Depending on the capacity of the cells, it can take several hours.

If you know what you are doing, you could charge up the low cells individually directly from the charger through the balance plug (no more than 1A rate) with some sort of adaptor cable until they are closer to the volage of the higher cells. Then, hook up the balancer by itself to get them exact. Once balanced, you can charge normally. This will make things go a LOT faster, but if you're in no rush, just let the balancer do its thing.

brian , thanks so much for the post

i let it balance for a while and i am now an hour into charging @ 1 amp

going good, hopefully i can get this pack back in shape, thanks again