8.40V maybe?

I still have a venom pro charger. It was the first lipo charger I ever bought, but I don't use it at all now. I'd sell it, but I would feel really bad about even giving it away to anyone. It never charged batteries higher than 8.39V in the end and there were numerous occasions where it took around 2.5 hours to balance charge a 5000mAh battery. The battery was not unbalanced either. The charger just sucks.

Just do a standard charge. It will work better without plugging the balance port in. If you have a whole night to charge one battery, then you can try balancing it. Otherwise I wouldn't bother with that charger. Once in a while it will do it in around an hour. Not usually though.

I've got this charger too. Out of the box, there is a cutoff of 120 minutes for charging and discharging. You can override this in the user settings (see the manual).

As for charge rate, this guy maxxes out at 5 amps. on a 6000 mah pack, you will probably bump up against the max timer unless you change it. You should generally charge at 1C, which is the mah rate divided by 1000. i.e., a 3800 mah pack would be charged at 3.8 amps.... a 5000 mah pack would be 5.0 amps. You can always charge at a lower amperage than that, just don't go over it. Seeing how this charger doesn't put out more than 5 amps, you won't hit 1C on your pack but thats totally fine. It will just take longer to charge up at the lower amperage rate.

So either up the cut-off setting, or just be prepared to charge it a second time. It should still cut itsself off at the proper voltage the second time around when you truly do get the pack "full".

A lot of the LiPo "rules", like only charging at 1C, were valid a few years ago, but are outdated for most new packs. Most modern LiPo packs can handle charging at 3C or more. The majority of chargers out there don't have this capability though. If you are using packs that are a couple of years old or super cheap packs, you probably want to stick with 1C. If you just have a 5A charger, you don't have a choice anyway.

I now usually charge all my packs at 12Amps, but I have gone as high as 18Amps a few times when I was short on time because I forgot to hit start. No signs of heat or any other issues.

I used to need 2-3 batteries per car. Now I only need 1 battery per car and they are always ready for the next heat in plenty of time. Save on batteries, buy a good charger. This one is my preferred choice http://www.hobbyking.com/hobbycity/s...e_Charger.html From the outside it looks a lot like your typical 5A chargers, but it's what's inside that counts

Sounds like the lipo may have a bad cell. Have you run the 7.4 lipo pack below 6.0 volts?

Didn't see the last posts before I posted. From what was said the charger seems to be the problem. It just shouldn't take that long to balance a 6000mah lipo @ 5 amps.

If you decide to get another charger I highly recommend the Turnigy Accucel 6 http://www.hobbyking.com/hobbyking/s...arehouse_.html
Don't let the price fool you. We've had four of these for about 3 years with no problems except wires breaking from so much use.

Hey, 40V and a 7.4V battery are way out of the ball park.

Here's what you need to know.

How many cells has your battery?
It could have 4cells 4S or 2 cells 2S

What type is it?

Lithium Polymer (LiPo) ???


What current we want to charge at?

2Amps (2000mAh) will take three hours
3Amps (3000mAh) will take two hours
4Amps (4000mAh) 1.5 hours and so on.


What is the maximum voltage you can charge a Lithium based battery?
8-8.4 volts. (NOT 40V)

Note: when the voltage peaks at 8-8.4 the current (mAh) will begin to drop


It can be harmful so learn all the parameters and ensure you setup the charger correctly and use a correct charger.

Racers edge...