ONICD Batteries These are the oldest type of lithium battery stocks cell phone battery and as is the case with the laptop computer are less reliable than the newer types.
Deterioration is a function of temperature and charge level. Don't make the mistake of storing the battery fully charged, as that is the state where it breaks the fastest due to heat. Charge it to take it out and put it like that on the back seat of your car avoid direct sunlight and preferably put the mini lithium facts notebook on a firm flat surface while operating it.
The basic rule of getting a replacement battery is that it should have the same voltage as the original. An 18V drill cannot run on a 12V battery. It can only run on a 18V battery. The other thing is that the physical packaging of a battery can be different from company to company. A 12V Ryobi battery may not fit into a 12V Makita cordless drill unless the battery has the right physical dimensions. So make sure the replacement battery looks the same as the old one before you order it. Also, if you are looking for a replacement battery of the same voltage rating and by the same company, know that battery technology is changing rapidly. An 18V lithium-ion battery has a different physical packaging than a NiCad 18V battery.
The first thing to know is that simple battery care can enhance the performance and useful life of your cell phone battery. Did you know that a cell phone battery should last for up to 400 charge/discharge cycles? That's quite a bit. How does lithium bettery stock that break down? If you charge your phone each night, your battery will last 12-15 months. If you are only charging twice a week, your battery should last 2-3 years. So, if you can get away with charging less, then that's a sure fire way to getting longer life.
On February 25, 1998, I went into a cold and deserted New York City area park and prayed for deliverance from alcohol, drugs and mental illness. I cried and fell on my face with outstretched arms begging for my freedom. In the invisible realm I sensed a heaviness being lifted, I felt bondages being broken, chains snapping and a sense of release. I walked out of that park a free woman.
So, in summary, if you have a PC which is showing clock errors or BIOS problems look first at the little 3 volt battery. It could save you a fortune. Happy computing!