HART 20V batteries come in different capacities. The total amp-hours decide how long it will last in a single charge.
Following is the list of HART 20V Lithium-Ion Batteries:
- 20V 1.5Ah Battery (HPB01)
- 20V 2Ah Battery (HPB02)
- 20V 4Ah Battery (HPB03)
Many factors affect the total run-time for a HART 20V battery. Therefore, I have selected a medium-duty task for our test. We will drive 1½-inch #10 wood screws into common pine.
How Long Does a Hart 20v Battery Last?
A HART 20V 1.5Ah battery can last a continuous 30 mins for medium to heavy-duty tasks, like driving 1½-inch #10 wood screws into common pine.
A HART 20V 2.0Ah battery can last a continuous 38 mins for medium to heavy-duty tasks, like driving 1½-inch #10 wood screws into common pine.
A HART 20V 4.0Ah battery can last a continuous 64 mins for medium to heavy-duty tasks, like driving 1½-inch #10 wood screws into common pine.
| HART Battery | HART Drill | Screw Size | Material | Runtime | Total Screws |
|---|---|---|---|---|---|
| 20V 1.5Ah | 1/2″ Brushless | 1½-inch #10 wood screws | Common Pine Wood | 30 mins | 181 |
| 20V 2.0Ah | 1/2″ Brushless | 1½-inch #10 wood screws | Common Pine Wood | 38 mins | 216 |
| 20V 4.0Ah | 1/2″ Brushless | 1½-inch #10 wood screws | Common Pine Wood | 64 mins | 368 |
Factors Affecting Total Runtime of 20V Hart Battery
The total runtime of a HART 20V battery largely depends on multiple factors and can vary from one situation to another.
Battery Size:
The first thing which affects the overall runtime of a 20V HART battery is the amp hours. Amp hours is the amount of continuous current a battery can provide for one hour.
Current then translates into the amount of power a battery can deliver.
Power Output = Voltage x Amp-Hour
Below is a chart for how many watts a HART 20V battery can provide for a fixed duration before it runs out of charge.
These are theoretical numbers. The actual figures will be 10%-15% lower. The overall capacity will drop 20% after 300-500 cycles of usage.
| HART Battery | Power Output (1 Hour) | Power Output (30 Mins) | Power Output (15 Mins) |
|---|---|---|---|
| 20V 1.5Ah | 30 Watts | 60 Watts | 120 Watts |
| 20V 2.0Ah | 40 Watts | 80 Watts | 160 Watts |
| 20V 4.0Ah | 80 Watts | 160 Watts | 320 Watts |
Type of Work using your 20V HART Battery:
As explained in the last heading, the overall run-time of a 20V HART battery largely depends on what task are you doing.
For example, drilling in concrete will yield low runtimes, while driving screws in softwood will give phenomenal runtimes.
Similarly, a circular saw cutting a soft wooden board will yield different results than a hard oak wood block.
The run-time is directly proportional to usage and power output. Below is a very rough comparison.
| HART Battery | Task | Material | Runtime |
|---|---|---|---|
| 20V 2.0Ah | Drilling | Soft Wood | 20-30 Mins |
| 20V 2.0Ah | Drilling | Hard Wood | 15-20 Mins |
| 20V 2.0Ah | Drilling | Concrete | 10-15 Mins |
Operative Temperature of 20V HART Battery:
The total runtime of a 20V HART lithium-ion battery highly depends on the battery temperature. The temperature of the battery also affects the battery’s overall cycles.
HART 20V batteries come with a temperature sensor. As soon as the temperature reaches a set threshold, a HART tool will stop working to avoid damage to your 20V HART battery.
Run-Cycles Vs. The runtime of 20V HART Battery:
The overall run time of a Lithium-Ion HART 20V battery drops as it ages. Following is a chart describing the runtime of a 2oV 2 Amp Hour Battery after a certain number of run cycles.
Brushed vs. Brushless Motor:
Brushless motors are a lot more energy efficient than brushless motors. The energy efficiency comes due to the absence of physical brush contacts present in brushed motors.
The contacts produce a lot of heat and waste energy. So, the overall runtime of a 20V HART battery dramatically depends on the type of motor used in your tool.
Luckily, all HART tools are powered by BRUSHLESS motors making them very energy efficient.
Below is a great video to understand the differences between a brushed and brushless motor.
Condition of Your HART Cordless Tool:
A brand new HART tool will run longer than an old HART tool on the same battery. New tools are efficient with minimal friction inside their mechanical components.
The losses inside an old clumsy HART tool will yield lower run times. So make sure your tools are properly lubricated and in good condition before planning to change your batteries.
How Long Will a 20V HART Battery Last in term Life-Cycle?
HART 20V Batteries are lithium0ion batteries. Unfortunately, HART does not use high-quality SAMSUNG batteries; instead, they are some Chinese-made batteries that are not significantly worse but neither as good as Samsung-made batteries are.
Under normal conditions, your drill battery will last 4-6 years or 400-800 cycles. The overall life of your HART battery highly depends on operating temperatures, workload, charging & discharging behavior.
Operating Temperatures:
The overall life cycle of a 20V HART battery highly depends on the operating temperatures.
Below is a graph showing the effect of temperature vs. Life Cycles of a HART 20V Battery.
Charging and Discharging Behaviour:
Ok, so there are a few things you should take care of related to your 20V Lithium-ion HART batteries.
For the best overall life cycle, the best practice is to recharge your battery as soon as your tool starts showing signs of a lower battery.
Don’t wait for your battery to fully discharge before you charge it again to avoid losing life cycles.
Another thing you should take care of is to avoid storing a fully charged or fully discharged battery. This is the biggest reason for destroying your battery life cycle.
Fully charged batteries affect the internal chemistry if kept for a long term, like a few weeks or months.
Similarly, a fully discharged HART 20V battery will keep losing charge and reach a point where the terminal voltage is too low to be detected by a charger.
This will also affect your HART battery’s overall life.
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