https://www.bloomberg.com/news/articles/2020-12-07/hybrids-are-quietly-selling-faster-than-fully-electric-cars?
Hybrid sales in the U.S. rose 17% last year from 2018; in the European Union they rose 22% over the same period as the region braces for tightening emissions regulations. In China, Japanese brands — which claim the biggest share of the hybrid market globally — sold about 30% more hybrids, making the segment one of the market’s fastest growing. Electric-car sales by contrast increased 6% in 2019 from 2018, well down on previous years’ double-digit growth.
https://afdc.energy.gov/vehicles/electric_batteries.html
Nickel-Metal Hydride Batteries
Nickel-metal hydride batteries, used routinely in computer and medical equipment, offer reasonable specific energy and specific power capabilities. Nickel-metal hydride batteries have a much longer life cycle than lead-acid batteries and are safe and abuse tolerant. These batteries have been widely used in HEVs. The main challenges with nickel-metal hydride batteries are their high cost, high self-discharge and heat generation at high temperatures, and the need to control hydrogen loss.