mrc 989 and hyperion lba10

[neweuser]

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....

[BrianG]

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).

[MetalMan]

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.

[BrianG]

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???

[BrianG]

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