Interested in buying a replacement 18 volt Makita lithium-ion battery?  Look no more. You have found the answers to your questions. To begin you need to know what brand, voltage, and chemistry of the battery needed. This is easy since you already know that your brand is Makita and the voltage you need is 18V. The battery chemistry is lithium.
Batteries are made up of different chemistry's (i.e. nickel-cadmium, nickel metal hydride, lead, lithium-ion, and lithium-ion polymer). Lithium-ion batteries offer great benefits.  Since lithium is the lightest of all metals, it has greater electrochemical potential,  and has the largest energy density for its weight. Another great benefit is the fact that lithium-ion cells cause little harm when disposed.
Next, is to locate the model of your device and the part number of your battery that needs to be replaced.  To find the device model, look at the label on the power tool.  The model number will look like this: Makita BL1830 and will be compatible with many models including but not limited to BDA350, BDF451 and BDF451Z. To find the part number, look at the label on the original battery, this will look like: BL1830.
Now that you have those important items you can buy your replacement battery. One more great thing about this OEM 18 volt Makita lithium-ion battery, at an aftermarket price ($74.95), is that you not only get a one year warranty, you also get a battery with 100% more runtime! The runtime has to do with the battery's capacity to hold a charge.  This particular battery has a capacity of 3000 mAh (3.0 Ah) which is double the capacity of the OEM 18 volt Makita (that came with power tool). For you this means longer use between charges!
At Batteryship.com there are over thousands of batteries to choose from.  And now that you have the info needed to make the correct purchase, you are ready to finish all those projects you have going on.