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.