Lithium ion batteries are a great thing to buy if you want to cut your battery costs. They are not a new invention, they were first made in 1912. there are a huge amount to different batteries available from the smallest ones to some really big industrial type. For the amount of power that they are able to store. Most other types of power storage units are much bigger than Lithium ion batteries. The other main batteries that could be used for the same thing are much heavier. Lithium ion batteries high capacity is due to the material that they are made of. Lithium ion batteries do not suffer from a high discharge rate and are very practical for storing energy efficiently as well.
These large battery packs take up a lot of room and are pretty heavy, which adversely affects the fuel economy and the storage space in most hybrid cars. These batteries get their power from regenerative braking and/or from the gas engine. Also, they are very expensive, costing thousands of dollars to replace. Which is why they are guaranteed for the life of the car (read you warranty, some states make automakers guarantee the battery for 100,000 miles).
Why lithium stock-ion battery? Because it provides high energy density, runtime, and is light in weight. To run a power-sucking laptop, a battery with high energy density is required. The runtime of a laptop battery is based on what sort of applications you run. If you run basic applications for writing, reading, copying, chatting, etc, then your laptop battery runtime will be high compared to running a complex application that has a huge number crunching requirement.
Avoid deterioration from heat. Lithium-Ion accumulator cells used in today's notebooks are extremely vulnerable to heat. The notebooks are designed in a way that they drive heat away from the battery, but there are steps you can take yourself. Never close the lids on the bottom side, you can easily do that by putting them on a firm surface instead of your legs. Don't push them all the way in to the wall or against the wall with their exhaust lids as this is equally dangerous. Avoid direct sunlight whenever you can, choose a spot in your room where sun doesn't shine on the computer directly.
The weakest aspect of any smart phone would be battery life. You need to know the extent of your Lithium battery stocks Ion or suffer the consequences at the end of the sale. Most manufacturers offer some guidance on this department but only to the point they are most comfortable to share. What they wouldn't share to you is that you should never recharge your phone. You pick up the phone; saw that it is just around 30%. That is OK, leave it as it is. You juice it up fast, the device will not recharge as efficiently once you do it again. You need to drain the battery first from the stock power and then do the recharge.
External effects can be a radiator in your room or direct sunlight, or just simply a mind boggling ambient temperature. A Lithium mines Ontario-ion cell loses 20% of its maximum capacity in one year when it's stored on 40 degrees Celsius and full charge. Not too many people have 40 C in their room all year long, but what about internal heat sources? If you use your notebook from AC power, you're keeping it fully charged, which it doesn't fancy, and on about 40C.
To add spice to your inclination for mini size gadgets, there are mini phone receivers in cool color having an operational range up to 10 meters with adjustable volume and built-in 300 mAH rechargeable Lithium battery giving a talk time of over 5.5. Hours. These mini phones are compatible with Nokia, iPhone, Blackberry, Samsung etc. The Bluetooth version V2.0 is compatible with V1.1/1.2 and comes with one USB charging cable, one carrying strap and a manual to consult. Now, you do not have to leave your desk to instruct, chat or gossip.
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.