As an industrial mechanic over the last twenty years, I've seen the world of maintenance and other trades change through the advent of cordless tools. They reduce time, cost and can be utilized virtually everywhere. Technology has advanced from the very beginning of the cordless tool. Higher voltages, higher capacity, and more run times for batteries. These tools have gained popularity among tradesmen.
The creation of lithium-ion batteries specifically for the field of cordless tools fulfills the three demands of the consumer. Lithium-ion batteries can provide a reduction in the weight of the battery for cordless use of 25-40 percent and tool weight of up to 25%.
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In the past, a lot of batteries like NiCad or NiMH batteries needed to be extended beyond the handles of tools, like cordless drills circular saws, and reciprocating saws. This resulted in more than the weight that the battery as well as the tool.
Lithium-ion batteries also provide longer run-time on a single charge than NiCad.The most powerful lithium-ion battery can be 3.0 Ah. This is a 25 percent increase over the NiCad capacity of 2.4 Ah. The NiMH maximum capacity has a capacity of 3.5 Ah.
The lithium-ion battery may not have more run-time over NiMH but the lithium-ion battery can provide superior performance throughout the lifespan of the battery as compared to NiCad and NiMH. The results can be seen in the power delivery curve during the life of the lithium-ion batteries.