DeWalt 18 volt battery system

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The DeWalt 18V battery system is used for DeWalt power tools.

This battery system is the predecessor of the 20V MAX battery system.

When first introduced the 18 volt battery packs used Ni-Cd cells. But later battery packs with Ni-MH and Li-On cells were also introduced to the system.

Because of the lower voltage of 1.2 volt of Ni-Cd cells the battery packs have to contain 15 of them which makes the batteries quite bulky compared to modern Li-On battery packs.

The batteries have a "tower" on top of them which contains one cell which slides into the handle. This reduces the bulk outside the body somewhat.

It is possible to use 20V Max batteries on 18V tools using the DCA1820 battery adapter