I have a friend that has one of the hybrids cars where it still uses gas, but also uses electricity.
The batteries needed replacing. The dealer wanted $800.00.
He did it himself for $80.00.
There are two batteries in most hybrids... the one that starts the engine and the one that provides supplemental power to the car. You can buy the one that starts the engine for around $80, but the other battery is going to set you back a lot more than that even “refurbished” and not new. A Toyota Prius 2010-2015 Hybrid Battery Pack with BRAND NEW CELLS, and a 48 months warranty costs $2250 and a lot more than that for an actual new battery from the dealer.