External effects can be a radiator in your room or direct sunlight, or just simply a mind boggling ambient temperature. A lithium stocks canada-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.
If your drill didn't come with a second battery my cordless Bosch drill did than you will either have to purchase a second battery or take a short break until Lithium mines Ontario your battery is ready.
Now, let us move on to your media. The smart phone is great since you can sync it with a computer and do your thing. Using syncing applications is necessary to move and transfer or update media from desktop to mobile. It is easier right now and you can even customize the content that you want on your phone and make the transfer.
Don't let your battery fully discharge. If you let your battery die frequently, you are putting extra strain on the Lithium battery stocks. Most companies recommend discharging the battery once in every 20 charges or so.
Why Lithium-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.
The odds that you will using the Lithium-Ion batteries are 99% ( that's if you are using the new breeds of laptops :) ). Just check the abbreviation that says LION or Li-Ion on your laptop battery label. There are still a few laptops that are using Ni-MH batteries these days and you might want to check with the manufacturer whether you can do an upgrade from Ni-MH to Li-Ion. Using unapproved batteries could led to dire consequences .... so do be very careful on this. If you have a higher budget you might want to check out SMART batteries. It has a power management circuitry and it will indicate to the user what is the current condition of the battery.