What are the differences between Toyota's NiMH and lithium batteries?

[StJasper]

NiMH batteries and lithium batteries differ in the following aspects: 1. Different cell voltages: Lithium-ion batteries have a voltage of 3.7-4.2V, while NiMH batteries only have 1.2V. The capacity of a single lithium-ion battery is equivalent to three NiMH batteries connected in series. 2. Different charging speeds: Due to the active nature of lithium ions, they move faster inside the battery, allowing for higher charging currents and faster charging speeds. A single lithium-ion battery can be fully charged in about 3 hours, whereas NiMH batteries charge much more slowly, taking roughly a day to fully charge. 3. Different energy densities: Lithium-ion batteries have a high energy density, with electric vehicle power batteries already achieving over 160Wh/kg. NiMH batteries have a lower energy density, ranging only from 40 to 70Wh/kg. Therefore, for the same volume, lithium-ion batteries have a larger capacity than NiMH batteries. 4. Different memory effects: Lithium-ion batteries have no memory effect and can be charged at any time. NiMH batteries have a certain memory effect, so it is best to fully discharge and charge them during normal use to avoid affecting battery capacity.