Just like all portable devices, Macbooks also need a battery in order to keep functioning , as they have no other alternative of getting energy from some place else. These batteries are more and more efficient and this way they can provide more independent use time for your Macbook.
They have now a better quality and are safer and also smaller. Fortunately these batteries are rechargeable and you can recharge them by plugging them in a wall plug and also using an adaptor. Any way, they are not supposed to last for ever, so they only last for a limited period of time , usually a number of cycles of chrage -recharge between 300-500. You must be careful when handling this battery and also to use it properly in order not to shorten its life span.
For example when you use the battery for the first time it is recommended for you to chrage it and also discharge it totally a few times in order to allow it to get to its maximum capacity. When you do this for the first time, your battery level may show as full for only a quarter of an hour, but do not stop charging it, but remove it for two minutes and then put it back in and it will start charging again. Apparently this happens frequently with new batteries for Macbooks.
Be careful to keep the battery in the proper conditions for functioning, that is to avoid a very wet atmosphere or the direct action of the sun and also extreme temperatures. Do not attempt to disassemble it or make a hole in it or throw it into the fire, even if it is dead and you no longer use it, as it may be dangerous. The battery contains very toxic substances that are also flammable when get into contact with fire and can cause an explosion.
When you want to purchase a battery for your Macbook, make sure you really need one and the malfunction is not caused by another component. Then you should buy only Lithium ion batteries, as they are a lot better than the older ones. The users also say that the best batteries are the ones manufactured in Japan and Korea. But if you order online, try to find the retailers that are as close to your home town as possible in order to avoid spending too much money on shipping. So if you live in Canada and need to buy a Macbook Pro battery in Canada, just search the websites from your country.
Buy only new batteries , not used ones, as you will spend your money for something that is already half dead. It is very important to look for the exact matching battery in order to be sure that it will fit perfectly with your macbook. Do not forget about the warranty as you may get a deffective one and you will have no possibility to have it replaced unless you have some warranty.
So here are some helpful links for buying a Macbook Pro battery in Canada: www.laptopbatteriesshop.ca, www.batterycanada.com, www.shopbot.ca, www.canada-battery.ca.