The pro-grade Bosch 36-volt lithium-ion recip saw is the most expensive but also the most powerful of the saws we tested. A 36-volt recip saw is tantamount to having one's own hydroelectric service in your hands. The awe-inspiring power and long-lasting charges make it a superb tool for anyone with a big need for a recip saw without a tail (cord). Bosch also offers an 18-volt version.