Despite some claims, the primary advantage of lithium-ion batteries is that they are smaller in size and weigh less than nickel cadmium (NiCad) and nickel-metal hydride (NiMH) batteries. It is important to understand that lithium-ion is not power, which is determined by voltage; it is not run time, which is determined by amp-hour rating; and it is not torque or speed, which is determined by the tool design.
Geared toward performance
The 36-volt platform was designed to provide professional contractors with the performance of a corded tool without the restriction of a power cord. During the research and development stage we conducted extensive field research to establish exactly how professional contractors use corded tools on the job. Sensors were attached to the tools to digitally record information.This information was collected electronically with data logger technology, which is a unique testing system developed and exclusively used by DeWalt, to determine the most effective high-voltage solution. As a result of this research, we determined 36 volts was the cordless platform with the capabilities that best matched or exceeded the performance of corded tools. The ergonomic benefit of lithium-ion provides a power-to-weight benefit, which allows users to utilize cordless tools for corded applications, and provides distributors opportunities for additional sales of cordless tools.
Where do older models fit in?
All types of batteries have different benefits, and depending on the product and application, a different type of battery might suit the needs better than another. There is still a huge market for NiCd and NiMH. These battery technologies are going to be relevant as they provide the necessary amount of power and run time for most end users. There is a very large base of professional contractors out there have bought into NiCad tool platforms and trust its history of durability. NiCad-based sales are still growing and this technology continues to meet the user needs extremely well.
When a customer is looking for cordless tools, the best way for a distributor to promote the products is to provide the customer with information to help him/her select the best tool for their needs. For example, determine what type of tools are needed; do they only need a drill or would a four-tool combo kit be better? If the customer only needs a drill, a 14.4-volt offers a good balance of power and ergonomics. If cordless saws are desired, recommend 18- or 36-volt models — the harder the tasks the higher voltage. Also, let them know about the new features built into some of the new tools, not just the battery technology. For instance, drills with new self-tightening chucks, three-speed transmissions, better ergonomics providing balance and comfort and tool-less accessory changing.
What's next?
Over the past 15 years, almost all of the cordless growth has come from converting applications previously only possible with cords. Additionally, there have always been ongoing efforts to improve existing categories with performance, ergonomic and feature enhancements.
To take advantage of what's available today, consider selling a tool and not a battery. In the case of a 36-volt system, we didn't simply slap a new battery on an old tool. Instead we developed the tools from the ground up to accommodate this new level of cordless power. Customers should be aware of the value of buying into a system and consider all future purchases down the road that will allow them to expand on what they already have. Standardization can help to save time and money in the long run.
Terry Tuerk, product manager for Metabo Corporation
High performance and environmentally friendly, too
We feel that by far the biggest advancement made in recent years concerning battery technology for power tools has been the development and employment of lithium-ion batteries.
