Reddit mentions of DEWALT 20V MAX Cordless Drill Combo Kit, 2-Tool (DCK240C2)

You're getting downvoted, but you are probably right. The batteries that were most commonly marketed as 18V were substantially heavier.

The difference is the battery tech: The 18V one would be NiCad, the 20V one is LiPo. LiPo's have much greater power density, so they use a smaller battery to get the same capacity. The also hold a charge considerably longer between uses and don't have the issues with memory.

You could also get a heavier battery by increasing capacity (more use between charges). That's probably not the case here since they would likely both be 20V if they were LiPos, but it's possible.

Edit: Err... LiIon, not LiPo.

• Hammer
  
• Level
  
• Measuring Tape
  
• Some screw drivers -
  
• Drill / Impact Driver . - https://www.amazon.com/DEWALT-DCK240C2-Lithium-Driver-Impact/dp/B00IJ0ALYS
  
• Dry wall anchor kit - https://www.amazon.com/Hilitchi-Plastic-Drilling-Drywall-Hollow-wall/dp/B01IGMMJ9S/ref=sr_1_15?s=hi&ie=UTF8&qid=1540921117&sr=1-15&keywords=drywall+anchor+kit
  

I guess I could just spend the extra $50 and get both. That would cover both your suggestion and the one by /u/OutlawGourmet1

https://www.amazon.com/DEWALT-DCK240C2-Lithium-Driver-Impact/dp/B00IJ0ALYS/ref=sr_1_10?s=hi&ie=UTF8&qid=1541128605&sr=1-10&keywords=hex+impact+driver&refinements=p_89%3ADEWALT

I bought my 20v dewalt kit over the 18v because the batteries weigh half as much.

Edit: American dewalt 18v versus American dewalt 20v.

Keep an eye out for deals (sites like slickdeals.net can help with this). I started with this set of Dewalt 20v Impact Driver/Drill and have just bought additional tools as needed for projects. Plenty of power and the batteries last forever.

I have this set: https://smile.amazon.com/DEWALT-DCK240C2-Lithium-Driver-Impact/dp/B00IJ0ALYS/ I used this set to built a 10x30 deck, predrilled holes for screws and used the impact driver to run the screws in.

Get this impact driver bit set: https://smile.amazon.com/DEWALT-DW2166-Piece-Screwdriving-Tough/dp/B002JWSNIS/ref=pd_sim_469_4?_encoding=UTF8&pd_rd_i=B002JWSNIS&pd_rd_r=89a3035b-cdb0-11e8-ab44-9143b7b890b1&pd_rd_w=vQWg3&pd_rd_wg=vqt4n&pf_rd_i=desktop-dp-sims&pf_rd_m=ATVPDKIKX0DER&pf_rd_p=18bb0b78-4200-49b9-ac91-f141d61a1780&pf_rd_r=NMZEJE4DZECRHVJVWV50&pf_rd_s=desktop-dp-sims&pf_rd_t=40701&psc=1&refRID=NMZEJE4DZECRHVJVWV50

The five bits in the lower left hand corner of the box fit the impact driver. The other bits fit into the middle three bits.

I would get this:

https://smile.amazon.com/DEWALT-DCK240C2-Lithium-Driver-Impact/dp/B00IJ0ALYS/

I have that set and I use the impact driver 90% of the time. It is lighter, smaller (easier to fit in tight places) and more powerful. I pretty much only use the "regular" driver from the set when I have a special bit that won't work with the impact driver.

Edit: I actually just realized I have this brushless impact driver:

https://smile.amazon.com/DEWALT-DCF887B-Li-Ion-Brushless-3-Speed/dp/B0183RLW8A/

but the "regular" driver from that set. Brushless generally gets a bit more life out of a battery, not a ton of other difference.

Also, you can do most exterior work (drill into brick, concrete, etc) with the impact driver and the correct bit(s) (or the other driver and correct bits). I've put in concrete anchors in slab, drilled holes to mount things in a brick wall, etc with pretty much the first set I linked.

https://www.amazon.com/DEWALT-DCK240C2-Lithium-Driver-Impact/dp/B00IJ0ALYS/ref=sr_1_3?ie=UTF8&qid=1487274792&sr=8-3&keywords=dewalt

I wound up with DeWalt, but I caught a deal on drill, driver and toolkit for $230 a while back.

You can get either Milwaukee or DeWalt for $160 right now:

https://www.amazon.com/DEWALT-DCK240C2-Lithium-Driver-Impact/dp/B00IJ0ALYS

https://www.homedepot.com/p/Milwaukee-M18-18-Volt-Lithium-Ion-Cordless-Drill-Driver-Impact-Driver-Combo-Kit-2-Tool-w-2-1-5Ah-Batteries-Charger-Tool-Bag-2691-22/100650378