Lipo chargers dont use the peak meathod for charging. They use a Constant Current / Constant Voltage method.

They basically put out the current that you set based on 1C of the mah of the pack and when the correct votage is reached (16.8v in this case) they switch to a constant voltage output. Where the current is lowered slowly to keep the cell at the 16.8v untill it wont take any more charge.

If yours shut down early there may be some sort of safety set on the charger that limits the mah that it will put into a pack or will only charge for a certain amount of time as a safety.

WHat charger are you using?

Im using a HYPERION EOS5Idp charger. Also i'm balance charging, & was wondering when the charge cycle ends. If the balance lights are still on do you stand alone balance them ?.

I cant really help you with that charger. I dont know anything about it. Maybee someone who does will chime in here.

As for balancing, Its my understanding that its best to balance at a somewhat dicharged voltage level rather than a full charge. Something about it being more accurate, but I wouldnt think it would matter that much. I certainly dont this you will hurt anything to let it continue to balance after the full charge.

I balanced them before i put them on the charger. I also balance charge them, & they change a little. So i've read somewere you should balance them again after there done & before use . True or false ?.

The disadvantage to balancing at any point after the charge is that any high cells will be discharged until they are at the same level as the others. This could reduce runtime, albeit very little. As long as the pack is fully balanced by the end of the charge cycle, there should be no imbalance.

Jhautz, the reason for charging and balancing a pack somewhat discharged is to provide enough time for the balancer to work. Balancers usually discharge the high cells at around 100mA tops. But if you are charging at say 5A, that discharge will have little effect. In essense, any high cells would be charged at 4.9A (net charge of 5A with a 100mA drain), so those cells are charged slightly slower and then the lower cells have more of a chance to catch up. I hope that made sense.

Brian my packs just finished charging. Two of the 4 leds are still on, do you think i should run it as is or balance them again ?. They were balanced before i started the charge process.

I would let them finish balancing. After you put several runs on that pack, the cells shouldn't do that anymore.

So, for future charges: If the balancer lights are flashing, I would leave the pack connected until the lights stop even if the charge is done.

I allready took them of the balancer before your repliy . Do you think it's okay to run them or should i balance them again to be safe ?".

You should be ok. Remember, flashing LEDs on the balancer means they are slightly out of balance. Solid LEDs would mean a bad imbalance. Although, it certainly won't hurt to balance them before running.

When i say flashing it it looks really fast like a flicker. it kind of looks soild but you can see a slight flicker. I have also seen a on & off blinking.

Pack A cells are 4.16 & 4.14
Pack B cells are 4.14 each

That's fine then. A 0.02v deviation is nothing to worry about IMO.

Could this be because they were sitting for a while before i bought them, & could this get better after i use them a little ?.

I don't know why, I just know that after a few cycles, they don't seem to be out of balance as much.

Thank's