There's a massive weight trade-off. ICE engines are heavy, even when just used as an electrical generator. Carrying that weight means a lot less weight for batt

There's a massive weight trade-off. ICE engines are heavy, even when just used as an electrical generator. Carrying that weight means a lot less weight for batteries (and a lot less capacity). So generally at this point the battery chemistries are about the same, but there's a lot less battery in a hybrid.