So you want to change out your APC Replacement Battery? Well first things, first, locate the unit's model number. This should be a small white sticker located on the back side of the unit you can find this by looking for the outlets; they are right near one another. Once you have the number you can be assured to find the proper APC Replacement Battery that is fitted for your particular model. Write down the number and save it, you'll need it shortly. Now use your computer and hop online to go to the APC's official backups index page. On this page you will be able to enter your model number into a search box. Once you click on 'submit' the search should show you the proper battery which fits your unit. Once you have the type of APC replacement battery you need, you can then purchase it from the APC website. From here they sell brand new APC replacement batteries that are "plug and play" and guaranteed to work upon arrival. The one small downside to this is that the APC site is very pricey. Fear not, however, because now you have the information you need to shop around for a more reassembly priced APC Replacement battery!
I am a big fan of shopping online, but let's say you're the outdoors type? A do-it-yourself kind of person? Well you can remove your APC Battery from your unit and take it with you and go to your local battery shop. It is simpler to just use the internet to find what you need but some people don't like to deal with the hassle of shipping charges or waiting long for something they feel they can run out and replace.
One word of advice however, you should always take into consideration the actual brand of APC replacement battery you are purchasing.
Some brands are inferior to others. Remember, you get what you pay for. The most common brand of any APC Replacement battery is CSB Battery. CSB is regarded as one of the highest quality sealed lead acid battery manufactures. There is another brand that shows promise, 'Vision' but I personally haven't had a chance to check them out. APC has embraced these batteries so I can only assume that they are yet again another high quality APC Replacement Battery.