Standard AA-size penlight batteries (2-4 pieces). Resource batteries from 5 to 50 frames, so they supplied in the kit only for performance testing chamber. You'll need to buy extra batteries of this type and charger to them, which could result in $ 20-80. However, this type of power is universal and battery that sat down, you can always replace the batteries, bought in the nearest kiosk. In addition most comprehensive batteries of this type to make more shots than lithium facts-ion battery (but progress does not stand still and do not know what the situation will be one year).
The battery will over-charge if left attached to the charger. The battery stops charging automatically when full lithium facts so it will not over charge. If the battery is left on charge too long it is possible that heat will damage the battery.
Laptop computer uses: If you keep the battery in your laptop for everyday use, and power it from the wall socket, unplug the power every few days and let it run off the battery, as a battery at 40% capacity lasts longer than one at 100% capacity. if you don't travel with it, you should remove the laptop battery when on fixed power.
Why lithium bettery stock is this important? If you have a relatively new PC the only problem you will get are error messages relating to the clock on start up. No big deal. If your PC is older then a low battery could be a nightmare. I had a PC which once every few months refused to boot. Rather than take the PC in for repair or start replacing parts myself the first thing I did was look at the BIOS settings. It was soon obvious that the BIOS settings were corrupt (wrong bus speed). I put a volt meter on the battery and sure enough it was reading 2.2 volts.
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.
If they cannot help you, you can always do a search on the internet. You will likely still be able to find high quality and long lasting laptop batteries on the internet than you would with your manufacturer. Remember, it is important to look at the life of the battery. However, it is just as important to ensure that you are taking your own measures to ensure the life of your laptop batteries. This means you need to be looking at the right maintenance procedures and using techniques for saving power as much as you possibly can. This will help extend the life of your battery altogether.