I have a EOS720I super due charger. It will not peak S1 lipo out to 4.20. It will only charge them to 4.17. I have it set for 14 amp charge and 80% charge should take it to 4.28. I have had this hooked to power supply and car battery and makes no differance. I have down loaded the up they have for it which I think is 5.8. Help if you can please.

Assume you are charging a 1S single cell lipo? Hook it up to the balancer as well as the main leads. The better voltage sensing capability is in the balancer inputs, the charger needs that to charge to the max voltage safely, or for use of some of the advanced settings. Yes I know this sounds weird but is it how many of the better chargers work.

I have the balancer hooked up. I have one stray lead that would be used for a multi cell packs. What do I do with that our do I have the incorrect things.

Take a pic let us see what's going on you shouldn't have a stray lead.

In the attached you will see the wire that is used when you are matching 2 cells that am talking about.

My charger did something similar. It would charge 2s pack to 8.33v and stop.
You can change the TCS setting to charge an extra .05 volts to fully charge it.
But before you change it double check the voltage with a multimeter to make sure it is giving you the correct voltage. You do not need the balance cable on a 1s lipo.

I have the TSC set to 100% and the TVC set at +80 and when I check the battery when charge is completed it will show on meter 4.17 to 4.18.

What is the IR reading? And the voltage reading in the balancer screen towards end of charge?

Using a 2S balance tap seems weird, but I think it depends on the balance board, perhaps that is OK. Is it a Hyperion style or XH style (I think) board that came with the charger?

The IR is 18 and there is no reading for the balance of it.

18 milli-Ohms is fairly high resistance for a single cell. Likely not helping, if I remember correctly when I've experimented with some older packs they didn't hold voltage very well.

I would expect the single cell voltage to show up in the balancer screen if hooked up correctly?

I have a similar Hyperion charger and it will not fully charge in unbalanced mode, it has to have the balancer attached to charge to 4.20 or higher but I have yet to figure out how to do it with a 1s pack. Someone please explain. If I can't figure this out I will have to sell it and get an icharger.

Anyone?

I have both the 720 and the 615 and usually don't use the balancer for 1s since it's not really needed, though the display always says balancer not connected. If you are going to try the balancer port, you will need to modify the adapter to put the small pin (middle on a 2s) to plug into the battery and the positive or negative disconnected. Using it as shown, the voltage of the 1s will show up on the 2nd cell in the balancer which is likely not being looked at.

Could you explain or show exactly what wire goes where because I've tried every combo I can think of and it still shows 0 in the balancer.

I am testing it now, it's been a while since I used the Hyperion for 1s but I don't recall it ever having issues with not hitting 4.20 volts on the nose. Are you guys setting it for solo mode or quick mode?

I've just tested this, for using balance mode you need to modify one of your 2s balance leads. The red wire on the balance connector will not be used. Solder the Blue lead from the balance connector to the positive plug on the battery, the black lead remains on the negative battery post. I am currently charging a battery with this setup and the balance voltage for 1s registers, I'm also charging a battery with no balance lead and will report the results.