Hitachi WR 9DM Power Tool Battery Replacement

You can be sure that you are getting high quality WR 9DM Battery for your Hitachi WR 9DM, because all of our Hitachi WR 9DM Batteries and Battery Chargers are precision-engineered and rigorously tested for voltage, capacity, compatibility and safety to exceed original equipment manufacturer specifications.

How to calculate the run time of Hitachi WR 9DM Cordless Drill Battery Replacement

Hitachi WR 9DM Cordless Drill Battery have two main ratings on them: Volts and Amperes. Because size and weight of Cordless Drill Battery is limited when compared to larger batteries such as car batteries, most companies show their ratings with Volts and Mill amperes. One thousand Mill amperes equals 1 Ampere. When buying a battery, select batteries with the most Mill amperes (or mAh). Batteries are also rated by Watt-Hours, perhaps the simplest rating of all. This is found by multiplying the Volts and the Amperes together.

For example:

14.4 Volts, 4000mAh (Note: 4000mAh is equal to 4.0 Amperes).

14.4 x 4.0 = 57.60 Watt-Hours

Watt-Hours signify the energy needed to power one watt for one hour. This Hitachi WR 9DM Cordless Drill Battery can power 57.60 watts for one hour. If your machine runs at 20.50 watts, as an example, this Cordless Drill Battery could power your Drill for 2.8 hours.

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