Some people have mentioned that when they take their LiPo packs off charge they do not show 8.4 volts which is what LiPo chargers generally cut off at.
The voltage of any battery will fall back once disconnected, so within a minute or 2 the voltage will be a bit down. However it will depend on the quality of the battery. Generally the voltage should stay above 8.30 to go and race
1) Make sure your power source for your charger is capable enough. The voltage of a power source (12volt battery or mains adapter) being lower than 12volts will not get your LiPo up to 8.4volts once charged. We have seen LiPo packs come off charge only reading 8.14volts because of a low voltage power source. The voltage of any battery will fall back once disconnected, so within a minute or 2 the voltage will be a bit down. However it will depend on the quality of the battery. Generally the voltage should stay above 8.30 to go and race.
2) Connectors. Make sure all connections going to your LiPo packs and connections going to your charger are tight and of good quality. The resistance will be much higher through poor quality connectors and will have an effect on the voltage being lower than expected on your LiPo once charged. The higher the resistance the worse off you are.
3) Good quality soldering. Make sure whenever you do soldering that solder is not just on the outside of the wire, but that it has penetrated through to give a lower resistance and better contact.
Thanks for reading.