Change the Nickel-Cadmium batteries for other Lithium Ions, in an electric drill. The original battery pack is composed of 12 elements of Ni-Cd (1.2V), providing the set with a nominal voltage of 14.4V. When using Li-ion batteries (3.7V), it is only necessary to install 4 modules. 4 batteries of type 18650 are used, with a capacity of 9800 mAh (depending on the manufacturer). Although the real capacity of these batteries is much lower, these batteries are perfectly valid for powering an electric screwdriver. The protection and charging module YH11047A is installed inside the battery pack.
The batteries can be soldered with cables inside the support, or place springs as in a normal battery holder.
Renew the battery pack, in an electric drill
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