![]() For this reason, large cordless shears may require 20V batteries while measuring instruments may only require 12V cells for adequate performance. Tasks that use more torque need batteries with a higher voltage to complete the toughest jobs. Some cordless tools require more power than others. They don’t require the same maintenance as other batteries, and they can be recharged even after short periods of usage without damaging the cell’s performance. Li-Ion batteries, like those used in the DEWALT® cordless combo kits, are preferred in top-rated cordless tools because of their efficient energy discharge and their high storage capacity. They don’t require power-cycling to sustain performance over time, and they self-discharge less during storage. This happened because Li-Ion batteries store energy with greater efficiency than NiCd and NiMH batteries. These batteries rely on a more formidable technology than the other models, and it quickly grew into widespread usage among all cordless tools. Lithium-ion (Li-Ion) batteries came after both NiCd and NiMH technologies. They also store energy more efficiently than NiCd batteries. While many types of batteries lose their voltage as they discharge, NiMH batteries sustain their voltage over long periods of use. NiCd batteries handle this especially well, and you can store them with no charge without losing efficiency. NiCd and NiMH batteries both allow users to use the full capacity of the battery without damaging future performance. Some batteries should be discharged deeply before recharging. Both of these battery technologies allow you to recharge between uses, and both come with similar benefits. Modern nickel-metal hydride (NiMH) batteries came later. There are three different types of batteries used in the best cordless tools: Nickel-cadmium (NiCd) and nickel-metal hydride (NiMH) batteriesĬonsumer-grade nickel-cadmium (NiCd) batteries were among the first released into widespread usage. A hammer drill is a good example of a tool that benefits from a higher voltage. Tools with higher voltages may perform more effectively when used for heavy-duty applications, and they tend to cost a little extra. Understanding how battery voltage differences affect cordless tool performance will help you choose the right options. It runs on the same voltage batteries regardless of whether that battery advertises 3AH or 5AH, but a 20V battery with 5AH will allow you to use the cordless tool for significantly longer before it runs out of juice. More intense applications will benefit from batteries with higher AH ratings, allowing for a longer use with less frequent recharging.įor example, consider a cordless grinder that runs on 20V batteries. Check the AH ratings when you need to compare different batteries. These ratings differ depending on manufacturer and application but work as general indicators when comparing similar products. Some types of batteries lose voltage during discharge while others remain mainly stable.Īmp-hour (AH) ratings determine how long a battery holds a charge during use. Batteries with higher voltages work with more powerful cordless tools and provide the energy required for most high-torque applications. Voltage measures the battery’s energy, and amperes measure current. While a battery’s electrical potential is called “voltage”, the term “current” signifies the amount of electricity moving through a circuit.Ĭonsider voltage and amp-hours when you research specific batteries and during cordless tool comparisons. ![]() It signifies the maximum energy potential of a battery and serves as a necessity to produce an electric current. What Is Voltage?Ī battery’s voltage tells you how much power the cell generates in ideal conditions. Read about the differences between types of batteries and what to look for when you’re buying new cordless tools. ![]() Here is a discussion from DEWALT about battery basics. You know there are several voltage differences in cordless tools, but may not fully understand the details. You may be a craftsman with questions about the batteries you use every day. ![]()
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