Regular lipo or LiHV? Regular lipos charge up to 4.2/cell and LiHV can charge up to 4.35/cell.
If on regular lipos some racers might overcharge to around 4.22v/cell so it's is actually fully charged when you pull if off the charger as most of the time the voltage goes down to 4.19/4.18. sometimes the smallest amount can change alot to pro racers. Me? I'm not pro. I run LiHV and even though I race in stock classes I still charge to 8.7v while the rule is 8.44 max at most tracks. Just for having fun not really being competitive. (I will do 8.4v if I race in a awards or cash race)
But yes over charging can and is risky.