Patent ID: 7327120

Claim:
A charger assembly for a power cell for an electrical tool, the charger assembly for a power cell comprising: a power cell having two sides, each side having a mounting hole and an inside surface; a bottom contact face; two flanges formed in parallel on the bottom contact face respectively near the two sides; two through holes defined in the bottom contact face respectively near and outside the two flanges; a contact surface formed between the two flanges and having multiple slits defined longitudinally in the contact surface; multiple elongated electrodes mounted respectively in the slits in the contact surface; and two locking devices mounted respectively in the mounting holes in the two sides of the power cell; and a charger base having a top contact face having a mounting hole; two tracks formed on the contact top face to engage the two flanges on the power cell, each track having an lip and a locking cutout defined in the lip; an electrode base mounted firmly inside the charger base, protruding from the mounting hole in the charger base and having a top face; and multiple elongated electrodes attached to the top face of the electrode base; a positive stop mounted firmly inside the charger base and protruding from the mounting hole in the charger base; and a sliding cover mounted slidably on the two tracks over the elongated electrodes on the charger base and having multiple springs mounted between the sliding cover and the positive stop.