DEWALT 20V MAX POWERSTACK 1.7Ah Compact Battery Pack 2-Pack (DCBP034-2) – 50% More Power, 25% Smaller Size, Fast Charging

This battery is awesome! Compact, lighter and more power. It would be foolish not to purchase. I bought it to pair with my DCF850B and let me tell you its the perfect combo for tight spaces. The fact that I can use them with all my 20v DeWalt products makes it even better. I will be purchasing more and I highly recommend them.

[This review was collected as part of a promotion.] After I received the kit I immediately noticed the size and weight difference. The battery is 1/2" shorter and narrower than my DCB203 and definitely lighter. As I started testing in several tools I found it to be very comfortably balanced in the smaller, lighter tools. It provided good balance and no bulk in my Flashlight, impact driver or oscillating tool. When I tested the feel in my DCD998 Hammer Drill, initially I felt like I needed more weight in the battery in order to balance the tool to my comfort. While the battery is narrower and shorter, the length advantage is negated when the battery is placed in the tool because of the piece on the rear of every tool where the battery connects. It also tended to take a couple of tries to get the release lever down properly to remove the battery from a tool. I noticed the release lever protruded slightly from the battery unlike the DCB203 or DCB205. I didn't have any problems hitting the lever unintentionally but it did release differently than the old design where I thought it was stuck on the tools a couple of times. The performance in the flashlight and impact driver was as expected, I didn't test the runtime to exhaustion but the flashlight was on for 6+ hours and the battery was still at 2 bars (51-74%) and battery was cool. In the oscillating tool the Powerstack made a noticeable improvement when compared to the DCB203, 2aH. I don't ever use the DCB203 in the oscillating tool because it cuts so slowly where the Powerstack performed the similarly to my 5aH battery I usually use but with much better balance in the tool. I also tested the battery in my DCD998 while drilling some holes and I didn't notice a significant difference in power from the 5aH battery and the balance was better while using the tool than I initially expected. I also tested the batter on my Blower (DCBL722P1) and it again worked great. Again, I didn't test the tool to exhaustion of battery but it was light and comfortable any reduction in runtime wouldn't be a big issue since it is half the weight of the 5aH battery. I frequently just grab my DCB609 Flexvolt 9aH battery when using the blower because I never have to consider battery life but at 20% of the weight I'll use the Powerstack since it's so much lighter even if it means I need to grab a second battery at some point for long jobs. Overall, I was very impressed by the power of the Powerstack battery and the weight was really a difference maker when using the tools for a longer period of time. I'll definitely be looking at getting more of these batteries especially as the capacity increases. The performance and weight improvements significantly outweighed the small hassle with the release lever.