Obviously ICE are powered by lithium ion battery stocks the gasoline you buy when you fill up at a gas station. The electric motor/generator is powered by a large (and by large, I mean large and heavy) battery pack. Most hybrids on the road today have large Nickel-Metal Hydride (NiMH) battery packs somewhere near the trunk, or under the seats. (Read about the Lexus Hybrid battery pack).
A formerly crazy woman lithium facts and yet Jesus gave her the honor of being the first person to see the resurrected Christ. Then He made a woman the first evangelist when he told Mary Magdalene to run and tell the disciples that she had seen Him. Finally over 500 witnesses saw Jesus themselves. He had conquered death as He said He would.
All the phones now come with lithium ion batteries and charging should not be an issue ...although it's best not to charge them over 24 hours..Overnight every night is fine...they all do have a life though leaving it off when you don't need it can extend that. Although you would miss calls.
Remember how the old batteries would start to wind down before they quit totally? Well, the new Li-ion batteries don't do that. They have the same power when drilling the last screw as they did when drilling the first screw. That seemed amazing to me but I found lithium bettery stock it to be true.
In terms of charging these powerful cells, when specifically used in an LED flashlight, special chargers are available all over the internet. Most will handle a 18650 battery as well as a variety of other Li-ion sizes.
For jobs where the batteries are required to be light weight as well as being reusable, then lithium batteries are ideal. But if a battery is needed to be very reliable or to remain unused for a long time then they might not be the right batteries for it.