Genuine Compaq PP2102X / PP2101X / 231964-001 / 231965-001 Li-Ion battery. 11.1 volt 6.6 amp 73.26 watts 6600mAH Li-Ion Main battery. Rectangular battery with five slit-type contacts on side. Dimensions:6.5 X 3.1 X 0.75. Laptop Battery for Compaq Armada 110 - Evo N110(OEM Part#: Compaq 231964-001 - Compaq PP2102X ) Compatible with Compaq 231964-001, Compaq 242319-B25, Compaq series PP2101X, Compaq 232031-001, Compaq PP2102X, Compaq B-5525LI. Don't settle for lesser quality battery made by 3rd party . Buy Brand New Genuine Compaq battery. Li-Ion batteries have the longest battery life with no memory effect.