DEWALT-DCF815S2 12-Volt Impact Driver

My Rating for the DEWALT DCF815S2 is 4.5 Stars

DCF815S2Review Summary: The DEWALT DCF815S2 12-Volt Impact Driver has a high impact rate and is light enough for those overhead jobs.


Detailed Review of the DEWALT DCF815S2 12 volt cordless impact driver

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Impacts per Minute (IPM) Grade: Excellent

The DEWALT DCF815S2 has a top IPM of 3400 IPM. The average top IPM of 12 volt cordless impact drivers is 2955 IPM. An impact driver delivers blows in a rotational way as opposed to a hammer drill which delivers blows into the work. The higher the IPM of a cordless impact driver the faster a screw or bolt will be installed or removed.

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Power Grade: Average

The DEWALT DCF815S2 has a power rating of 950 in/lbs. The average power rating of a 12 volt cordless impact driver is 981 in/lbs. The power of a cordless impact driver is measured by torque (inch-pounds). Torque is the measurement of the twisting force the drill applies when started. Power in DeWalt cordless drills is measured in unit watts out(uwo) which measures torque at different drill speeds.

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Speed: Good

The DEWALT DCF815S2 has a top speed of 2450 rpm. Higher speeds help you drill holes quicker and cleaner. The average speed of a 12 volt cordless impact driver is around 2423 rpm.

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Battery Run Time: Below Average

The battery run time is 1.3 amp hours. The average for 12 volt cordless impact drivers is 1.5 amp hours. The ampere-hour rating (Ah) gives you an idea of how long your battery will last between charges. A 3Ah will last 3 times longer than a 1Ah battery. If you are looking for a cordless impact driver that will run longer between charges, check out my review of the Hitachi WH12DMR 12-Volt Impact Driver. The battery run time is rated at 2.0 amp hours.

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Battery type and quantity: Good

The DEWALT DCF815S2 comes with 2 Lithium Ion batteries. Most newer cordless impact drivers have 2 Lithium batteries included. Lithium are lighter , can hold a charge longer, and are more environmentally friendly than older NiCd batteries.

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Charger: Good

The DEWALT DCF815S2 comes with a 40 Minute charger. The best chargers offer less than 1 hour charging and a maintenance mode that can extend the life of the battery.

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Price Range: $100-200

Prices may have changed since this review was done. Always check the most recent and best price for the DEWALT DCF815S2 cordless impact driver from multiple stores.

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Tool Weight: Very Light

The DEWALT DCF815S2 weighs 2.3 lbs. The average 12V cordless impact driver weighs about 2.8 lbs. Tool weight comes into play when you use it for extended periods of time or you hold it in awkward positions.

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DEWALT DCF815S2 Cordless Impact Driver Strengths

  1. High impact rate
  2. Very light
  3. Fast battery charger
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DEWALT DCF815S2 Cordless Impact Driver Weaknesses

  1. Shorter battery run time
  2. Below average power

Some other features of the DEWALT DCF815S2 include:

  • LED work light
  • Belt clip and tool bag
  • Three-year limited warranty
Order the DEWALT DCF815S2
Order the DEWALT DCF815S2

Reviewed by Jon Sevenson on 8/16/12.

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