DEWALT DC845KA 12-Volt Impact Driver

My Rating for the DEWALT DC845KA is 4 Stars

DEWALT DC845KAReview Summary: The DEWALT DC845KA 12-Volt Impact Driver has good torque and a longer than average run time for the average 12 volt tool.


Detailed Review of the DEWALT DC845KA 12 volt cordless impact driver

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Impacts per Minute (IPM) Grade: Below Average

The DEWALT DC845KA has a top IPM of 2700 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. If you are looking for a cordless impact driver with more impacts per minute, check out my review of the DEWALT-DCF815S2 12-Volt Impact Driver. It is rated at 3400 IPM.

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Power Grade: Excellent

The DEWALT DC845KA has a power rating of 1150 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: Average

The DEWALT DC845KA has a top speed of 2400 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: Good

The battery run time is 2.0 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.

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Battery type and quantity: Below Average

The DEWALT DC845KA comes with 2 NiCd 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: Average

The DEWALT DC845KA comes with a 60 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: $200-300

Prices may have changed since this review was done. Always check the most recent and best price for the DEWALT DC845KA cordless impact driver from multiple stores.

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Tool Weight: Heavy

The DEWALT DC845KA weighs 3.6 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. If the weight of this tool is an issue for you, then you may be interested in the Bosch PS41-2A 12-Volt Impact Driver. Check out my review of the Bosch PS41-2A 12-Volt Impact Driver. It is rated at 2.1 lbs.

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DEWALT DC845KA Cordless Impact Driver Strengths

  1. Good torque
  2. Longer run time
  3. Replaceable brushes
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DEWALT DC845KA Cordless Impact Driver Weaknesses

  1. Older battery technology
  2. Above average weight

Some other features of the DEWALT DC845KA include:

  • Carrying case
  • LED work light
  • Three-year limited warranty
Order the DEWALT DC845KA
Order the DEWALT DC845KA

Reviewed by Jon Sevenson on 8/28/12.

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