Left lipo charger on last night!

[brad65]

Hey guys, I'm hoping I can get some help here I don't know what else to go or do. I have two different type of good quality battery Maxamps and zippy 2s 5000 mah lipos that where in great cond used maybe 6 times. I charged a battey a week ago at night and forgot to take it off the charger before I went to bed. So I woke up and check the voltage was .2 volts lower than the other one. I though the battery was bad until I did the same thing last night. Now I know the charger takes some juice from just one cell while sitting there over the night. My problem is I can't get the charger to balance charge and get the low cell up pass 4.0 volts with the other one at 4.22. Is there a way to one charge one cell? Any help guys I'm stuck here with this problem. Also my charger is a Turnigy Accucel-6 50W 5A

[sjslhill]

Good time to have a blinky balancer from astroflight.

[brad65]

Good time to have a blinky balancer from astroflight.

Got one and I tried that also, still no luck. I tried it two different ways. One with a old school brian charger with the blinky balancer and I reached 4.28 volt and 4.04 with the low cell. I've did this twice no luck. The blinky balancer only dischargers I believe the higher cell. Maybe if I do it ten times LOL. This sucks

[sjslhill]

You should be able to plug it in and all cells will go to the lowest cell. What do you mean do it 10 times?

[txboatpilot]

Plug the Blinky in BY ITSELF and wait all day until all lights STOP blinking.. Then you can put it back on the charger, it should be ready for balance charging.. Good luck!

[Blackjack-sven]

doesn't sound like the cell is completely ruined so I would suggest charging and balancing a few times in a row to see if the voltage comes up at all. If so just keep charging and balancing until the numbers are right. If not the only suggestion I could give from there is to open the pack and specifically charge and balance just the one cell, but this is far from the best thing to do.

[Flying Scotsman]

I think and I will be rude you need a better charger, FMA, Hyperion, etc. you get what you pay for with chargers, especially!!! and always follow their instructions for charging...You must be in attendance during the charge cycle
The batteries are probably toast

Douggie

[AndyKunz]

If you have a bench power supply you should be able to charge the single cell with that using the balancing port.

If that doesn't work, just send the battery to me

Andy

[ride1226]

I just got done typing a huge response out and then my phone deleted it so Im shortening this one to the point.

The battery has already accepted a charge on that cell so the cell should be ok. Plug the blinky into the balance port ALONE without the charger attached and just let the blinky go until all the lights go out. Its going to take a long time considering the size of the pack.

I would recommend buying a better charger. It is somewhat true that you get what you pay for but thats if you dont know too much about the availability of these chargers. Hobby King has some nice clones of the thunder power chargers where the guts are basically put into a different shell. Also, the FMA cellpro 4s is AMAZING for what you pay for it. Since your only charging 2s for your boats it will work perfectly. I also highly recomend the thunder power tp610c. A little pricier but works perfectly for me and thats what I have been using since I jumped into lipo power. I will be picking up 2 more cellpro 4s chargers soon to speed up my charging process.

If all this fails, pack up your lipo equipment and send it to me. Ill take good care of it.

[brad65]

If you have a bench power supply you should be able to charge the single cell with that using the balancing port.

If that doesn't work, just send the battery to me

Andy

(Blinky balancer)I think the blinky stops at a set voltage so it not equaling them out.

Wow thanks guys, can you explain more how to charge through the tabs. Am I understand you correctly?

I just got done typing a huge response out and then my phone deleted it so Im shortening this one to the point.

The battery has already accepted a charge on that cell so the cell should be ok. Plug the blinky into the balance port ALONE without the charger attached and just let the blinky go until all the lights go out. Its going to take a long time considering the size of the pack.

I would recommend buying a better charger. It is somewhat true that you get what you pay for but thats if you dont know too much about the availability of these chargers. Hobby King has some nice clones of the thunder power chargers where the guts are basically put into a different shell. Also, the FMA cellpro 4s is AMAZING for what you pay for it. Since your only charging 2s for your boats it will work perfectly. I also highly recomend the thunder power tp610c. A little pricier but works perfectly for me and thats what I have been using since I jumped into lipo power. I will be picking up 2 more cellpro 4s chargers soon to speed up my charging process.

If all this fails, pack up your lipo equipment and send it to me. Ill take good care of it.

Thank you for the help, I understand what you mean about getting what you pay for this is true. But I never had a problem charging or balancing any over my battery till now. If I didn't trickle down that one cell everything would be fine. So your telling me that a better charger would take care of this problem???

[Meniscus]

...If that doesn't work, just send the battery to me

...If all this fails, pack up your lipo equipment and send it to me. Ill take good care of it.

You guys are hilarious! I'm third on the list!

[785boats]

Brad.
I think you would have more success taking some voltage out of the packs first, then balance with the blinky on its own, then charge with the balancer in circiut.
Take the voltage down to say 4.1 volts on the high cell with a load of 5amps. The low cell should go down to about 3.9 volts.
If the balancer won't balance them then I would say the balancer could be faulty.
Does it still balance charge a pack OK that wasn't left on the charger overnight.
Just a thought.
Paul.

[Flying Scotsman]

(Blinky balancer)I think the blinky stops at a set voltage so it not equaling them out.

Wow thanks guys, can you explain more how to charge through the tabs. Am I understand you correctly?



Thank you for the help, I understand what you mean about getting what you pay for this is true. But I never had a problem charging or balancing any over my battery till now. If I didn't trickle down that one cell everything would be fine. So your telling me that a better charger would take care of this problem???

No and Yes. The well designed chargers with integral ballancing in my opinon (IMO ) result in a safer charge process.

Douggie

[AndyKunz]

Wow thanks guys, can you explain more how to charge through the tabs. Am I understand you correctly?

It sounds like you're a little green yet, so I recommend just getting a good charger. Otherwise you need a good electronics bench supply which will be about the same price.

Several people have recommended the FMA Cellpro 4s. I have one and recommend it also. They have an upgraded version now for the same price which, if I were buying now, I would buy.

Andy

[ED66677]

I fully agree with Douggie, cheap Lipo charger gives poor balancing, and yes, well design chargers with built in balancer are just great and safer!

Something you could try is to charge 1S at a time, that's what I used to do before I invested in a proper charger/balancer, you need to make an adapter that will plug on the desired pins of the balancing tab! you might see that each cell reach a proper charge level if they are not toasted!
The balancing tab of a 2S pack is made with 3 wires (4 for a 3S, 5 for a 4S...), the first one (generaly the red one) is connected to the positive of the pack, the second one is connected to the "center" of the pack, at the connection between the two cells, the third one (generaly the black one) is connected to the negative of the pack, through this tab, you can also simply check accurately the voltage of each cell with a voltmeter, I always do it after every charge!