Since laptops are able to be powered off of batteries it only makes sense that you should always try to keep yours charged. In the event that the charge drains all the way you may have to get it into the charger and keep it there for quite a while in order to regain the full charge. In the past some batteries performed poorly after this process, but these days most laptop batteries are able to recover quite nicely. This is basically a representation of how technology has improved over the years.
In the unfortunate event that there is a battery issue with your laptop then you may want to check into buying another one simply as a spare. This is a common practice among laptop users who need to essentially have a backup power source. These users may spend extensive amounts of time away from any normal power source and therefore the battery becomes extremely important. Otherwise there are no other alternatives to power your laptop. Depending on where you are and how important the use of the computer is will tend to exemplify the importance of having a backup solution.
Some people will buy used laptop batteries in an effort to save on expenses. Just like buying refurbished laptops offers many benefits, so to does this approach for batteries. Not unlike any situation where you are buying a used item, you should be familiar with some of the more pertinent specifics involved. If you are certain that your used laptop will take the exact model number of the battery then you should not have any issues with the fit. Model numbers are usually clearly marked and therefore offer an easy reference point. This type of proactive maintenance has the ability to save you a whole lot of headaches if anything like this ever happens to you.