The best cordless reciprocating saw as of 2023 is the Milwaukee M18 Fuel Sawzall (model 2821-20). This tool is highly regarded for its power, durability, and advanced features. It operates on Milwaukee's M18 Fuel platform, which combines a powerful brushless motor with the brand's REDLITHIUM battery technology, providing extended run time and enhanced performance. Key features include: 1. **Power and Performance**: The brushless motor delivers up to 3,000 strokes per minute with a 1-1/4 inch stroke length, allowing for fast and efficient cutting through various materials, including wood, metal, and PVC. 2. **Durability**: The saw is designed with a robust build to withstand tough job site conditions. It features a metal reinforced battery connection and an all-metal gear case for added longevity. 3. **REDLINK PLUS Intelligence**: This system provides advanced overload protection, ensuring the tool and battery are safeguarded against heavy-duty use. It also optimizes performance and prevents overheating. 4. **Ease of Use**: The saw includes a keyless adjustable shoe and a QUIK-LOK blade clamp for quick and easy blade changes. Its ergonomic design and anti-vibration technology enhance user comfort during prolonged use. 5. **Battery Compatibility**: The tool is compatible with all M18 batteries, offering flexibility and convenience for users already invested in the Milwaukee ecosystem. Overall, the Milwaukee M18 Fuel Sawzall stands out for its combination of power, efficiency, and user-friendly features, making it a top choice for professionals and DIY enthusiasts alike.

The battery life of a cordless reciprocating saw depends on several factors, including the battery's capacity (measured in ampere-hours, Ah), the power demands of the saw, the type of material being cut, and the frequency of use. Typically, cordless reciprocating saws use lithium-ion batteries, which are available in various capacities, commonly ranging from 1.5Ah to 9Ah or more. For light-duty tasks, such as cutting through softwood or thin metal, a 2Ah battery might last around 20 to 30 minutes of continuous use. For more demanding tasks, like cutting through hardwood or thick metal, the same battery might only last 10 to 15 minutes. Higher capacity batteries, such as 5Ah or 9Ah, will provide proportionally longer run times, potentially lasting up to an hour or more for light tasks and 30 to 45 minutes for heavy-duty tasks. The efficiency of the saw's motor and the speed settings also influence battery life. Brushless motors are generally more efficient than brushed motors, offering longer run times. Additionally, using the saw at lower speed settings can extend battery life, while higher speeds will drain the battery more quickly. Environmental factors, such as temperature, can also affect battery performance. Cold temperatures can reduce battery efficiency, leading to shorter run times. In summary, the battery life of a cordless reciprocating saw varies widely based on the battery capacity, the nature of the task, and the saw's efficiency. Users should consider these factors and choose a battery that meets their specific needs, possibly keeping spare batteries on hand for extended projects.

Yes, a cordless reciprocating saw can cut through metal, provided it is equipped with the appropriate blade. Reciprocating saws are versatile tools capable of cutting through various materials, including wood, plastic, and metal. For cutting metal, it is crucial to use a blade specifically designed for metal cutting. These blades typically have a higher TPI (teeth per inch) count, which allows for smoother and more efficient cutting through metal surfaces. When selecting a blade for cutting metal, look for bi-metal or carbide-tipped blades, as they are designed to withstand the hardness and durability required for metal cutting. The TPI for metal-cutting blades usually ranges from 14 to 24, depending on the thickness and type of metal being cut. Thinner metals may require a higher TPI, while thicker metals can be cut with a lower TPI blade. Cordless reciprocating saws offer the advantage of portability and ease of use, making them suitable for various job sites and applications. However, the power and battery life of the saw can impact its performance when cutting metal. Ensure the saw has sufficient power and a fully charged battery to maintain consistent cutting speed and efficiency. Additionally, when cutting metal, it is important to follow safety precautions. Wear appropriate personal protective equipment, such as safety goggles, gloves, and hearing protection. Secure the metal piece firmly to prevent movement during cutting, and ensure the work area is clear of any flammable materials, as sparks may be generated during the cutting process. In summary, with the right blade and proper precautions, a cordless reciprocating saw can effectively cut through metal.

A corded reciprocating saw is powered by electricity through a power cord connected to an outlet, providing a constant and reliable power source. This allows for continuous operation without the need for recharging or battery replacement, making it ideal for heavy-duty tasks and prolonged use. Corded models typically offer more power and higher cutting speeds, which can be advantageous for cutting through tougher materials like metal or thick wood. However, their mobility is limited by the length of the power cord, and they require access to an electrical outlet, which can be inconvenient in remote or outdoor locations. In contrast, a cordless reciprocating saw is powered by a rechargeable battery, offering greater portability and flexibility. This makes it suitable for use in areas without easy access to electricity and for tasks that require frequent movement. Cordless models are generally lighter and easier to handle, enhancing user comfort and reducing fatigue during extended use. However, they may have less power compared to corded versions, and their operation time is limited by battery life. Users need to manage battery charging and may require spare batteries for longer projects to avoid downtime. In summary, the choice between corded and cordless reciprocating saws depends on the specific needs of the user. Corded saws are better for continuous, high-power tasks, while cordless saws offer convenience and mobility for lighter, more flexible applications.

1. **Safety First**: Ensure the saw is turned off and remove the battery to prevent accidental activation. 2. **Locate the Blade Clamp**: Identify the blade clamp mechanism, which is usually near the front of the saw. This can be a lever, a twist knob, or a hex screw, depending on the model. 3. **Release the Blade**: - If it’s a lever or twist knob, turn or lift it to release the blade. - If it’s a hex screw, use the appropriate hex key to loosen the screw. 4. **Remove the Old Blade**: Carefully pull the old blade out of the clamp. Be cautious as the blade might still be sharp. 5. **Insert the New Blade**: - Align the new blade with the clamp, ensuring the teeth are facing the correct direction for cutting. - Insert the blade into the clamp until it is fully seated. 6. **Secure the Blade**: - If using a lever or twist knob, return it to its original position to lock the blade in place. - If using a hex screw, tighten it with the hex key to secure the blade. 7. **Check the Blade**: Gently tug on the blade to ensure it is firmly secured and does not wobble. 8. **Reattach the Battery**: Once the blade is securely in place, reattach the battery to the saw. 9. **Test the Saw**: Turn on the saw briefly to ensure the blade is functioning correctly and is properly aligned. 10. **Resume Work**: With the new blade securely installed, you can continue your cutting tasks.