How to calculate the charge times of Dewalt drill battery?
If you can’t find your battery model in the chart, please do not worry. You can also use a calculator to calculate the charge time of your replacement Dewalt power tools battery. However, you must know the correct battery capacity (mAh) and the current charge rate (mA) firstly.
Maximum Time To Full Charge = Battery Capacity / Charge Rate Current * 20% Efficiency Loss
Then you could put this information in above formula , providing you with the maximum time (hours) you’d need to charge your Dewalt DW9098 cordless drill battery.
For example:
The calculator generates result which will give you the charging time with 20% efficiency loss.
How long will your power tool last with a fresh charge?
That question can only be answered by how you use your power tool. For example, when using a drill your usage time can vary based on the speed you use. Drilling into steel will use more power than drilling into wood or drywall.
Here are some formulas to help give you an idea of how long the Dewalt drill battery will last.
Amp hours = number of amps x number of hours
Amp hours / number of amps = number of hours
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