The 6 Best Dewalt Batteries of 2020







1,805 Ratings
5/5
DEWALT 20V MAX XR 20V Battery
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  1. Compatible with DEWALT 20 volt max tools
  2. Compact, lightweight design
  3. Premium XR 5.0 Ampere hour Lithium Ion battery
  4. No memory and virtually no self-discharge
  5. Includes 2 batteries
  6. Maximum initial battery voltage (measured without a workload) is 20 volts. Nominal voltage is 18
4.5/5

3615 ratings

@Amazon.com

DEWALT DCB606-2 20V MAX 6.0Ah Lithium Ion Premium Battery
519gPkJ0qlL._AC_
  1. The Power of Corded with the Flexibility of cordless
  2. 3X The Power of DC9096 18V Battery
  3. Durable construction with single piece cell holder
  4. 4X The Runtime of DCB201 1.5Ah Battery
  5. Tri-Platform compatibility with 20V MAX, 60V MAX and 120V MAX
  6. LED State of Charge Display
4.5/5

2040 ratings

@Amazon.com

DEWALT 20V MAX Battery Starter Kit with 2 Batteries
71BWs4SWQJL._AC_SL1200_
  1. (2) 20V max 5.0Ah XR batteries, which provide up to 10 amp hours of capacity
  2. Charges all 12V, 20V and 60V max batteries at a 4 amp charge rate
  3. Kit includes a soft bag for additional tool storage
  4. Batteries come with a 3 year free service warranty
4.5/5

1483 ratings

@Amazon.com

DEWALT DCB609-2 20V/60V MAX FLEXVOLT 9Ah Battery
61icuGgl7HL._AC_SL1000_
  1. 6X RUNTIME**: 9.0 Ampere hour capacity when used in 20 Volt MAX* tools
  2. DUAL VOLTAGE FOR FLEXIBILITY: Compatible with all 20 Volt MAX*, 60 Volt MAX*, and 120 Volt MAX* tools
  3. COMPATIBLE WITH 20 Volt MAX* CHARGERS: With a charge time of one hour
  4. STATE OF CHARGE DISPLAY: LED battery charge indicator allows you to view current state of charge
  5. PROVIDES 360 WATT HOURS: When using (2) FLEXVOLT 9.0 Ampere hour batteries in 120V MAX* tools
  6. 6X the runtime compared to DCB201 1.5 Ampere hour Battery
4.5/5

1011 ratings

@Amazon.com

DEWALT 20V MAX XR Battery
61yJzh+vfjL._AC_SL1200_
  1. Compatible with DEWALT 20 Volt MAX tools
  2. Compact, light weight design
  3. Premium XR 5.0 Ampere hour Lithium Ion battery
  4. No memory and virtually no self discharge
4.5/5

2310 ratings

@Amazon.com

DEWALT DCB240-2 20V MAX 4Ah Compact Lithium Ion Battery
712iqsCG4AL._AC_SL1500_
  1. 4 Amp hour (80 Watt hour) capacity provides extended runtime
  2. Same size & weight as DCB230 20V MAX compact 3Ah battery
  3. Lighter weight with same capacity as DCB204 4Ah battery
  4. Compatible with 20V MAX tools and chargers
  5. Includes fuel gauge 3-LED charge indicator
4.5/5

1158 ratings

@Amazon.com


Tips for Choosing a Battery

Cycle

The cycle of a battery is determined by the number full charge and discharge cycles. This is before its functional capacity falls to below 80% of its original capacity. A battery’s life cycle takes into consideration the number of charges and discharges before it becomes obsolete.

There are many factors that determine the number of cycles that a battery undergoes before it makes its final bow; these include the discharge rate and depth of discharge. The battery’s operating temperature and charging methods are also key considerations.

Self-discharge

Self-discharge occurs when the electrical capacity of the battery is lost, mostly because the cell is sitting on the shelf and not active at all. Electrical and internal chemical reactions within the cell are what initiates self-discharge, in what looks like the exertion of a small external load. This automatically reduces the stored charge of the battery.

Self- discharge is one key reason for the decrease in the shelf life of a battery. When in use, the battery tends to function at less than full charge simply because of self-discharge.

Memory Effect

Also known as lazy battery effect, memory effect occurs when there’s a reduction in the durability of a battery’s charge. This is a consequence of repeated recharging after incomplete discharge in earlier usages. The frequent recharging in effect causes the crystalline structure of the electrodes to manifest differently.

The capacity of the charging system is also gradually reduced. In this case, the battery tries to remember and function on the small capacity. There are several causes of memory effect/ these include:

1.Repeated partial charges

2.The make of the battery; there are some models that develop memory effect in cases of incomplete discharge before recharging.

3.High or low rates of discharge

4.When the charging time is limited and inadequate

5.The charger is itself is poorly designed or malfunctioning

Different designs and models react differently to the memory effect. Some of them do not experience memory effect at all, while others undergo significant levels of the same.

Voltage

Basically, Voltage in a battery signifies the difference in electric potential between the positive and negative terminals of a battery. One terminal is positively charged, and the other is negatively charged. If there is a big difference in the potential, it leads to a greater voltage. In essence, voltage is what determines the amount of energy a battery can discharge at one single time.

Charging a battery makes the voltage rise while discharging makes the voltage to fall low. It is like stretching and releasing a rubber band. There is an increase in both temperature and pressure during charge, hence increasing the voltage. Over-exertion and uncontrolled increase of the same can easily lead to rupture and explosion of the battery. In the same way, discharging the battery below the recommended capacity’s lower voltage can also lead to permanent damage to the battery.

Capacity

Battery capacity is determined and measured in ampere-hours. As such, Ah is the discharge current that a battery delivers over a period of time. It is possible to install with a higher Ah, than specified, to allow for longer runtime; at the same time, using a smaller pack than specified, allows for shorter runtime.

As is expected, chargers often have some tolerance when it comes to Ah. This then allows larger batteries to take a longer time to charge, as compared to a smaller pack.


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