DeWalt DCB548 54v XR Cordless FLEXVOLT Li-ion Battery 12ah

Battery AH Explained

The best way to describe battery amp hour is that this is effectively the size of your fuel tank, the more amp hours your battery has then the longer the battery will last between charges. More amp hours does not increase the power of a given tool.

Battery Voltage Explained

A tool with a higher voltage than another is a bit like choosing an engine in a car, the higher voltage will generally mean higher power & performance. As with cars though a bigger engine does not always translate to better performance so it is important to compare the specifications of tools at different voltages between different manufacturers.

DeWalt Flexvolt

DeWalt 54v Flexvolt is the new DeWalt dual voltage system. A 54v Tool can only use 54v batteries, however your new DeWalt 54v Flexvolt battery is fully compatible with all DeWalt 18v Li-ion Power Tools as it is capable of stepping into 18v mode for this purpose.

So upgrading to 54v means you can still make use of your 18v power tool range. 54v batteries are currently available in:

6ah (18v mode) / 2ah (54v mode)
9ah (18v mode) / 3ah (54v mode)
12ah (18v mode) / 4ah (54v mode)

The DeWalt Flexvolt system opens the door to types of tool becoming available in cordless that would never have been considered before such as Table Saws.