Block battery Wispy it thin 8-10mm case-panel for charging of different military and civil laptops (all types). When using batteries pack Wispy can prolong computer working time till 10 hours, depending on type of computer and programs used. Wispy battery pack has several dimensions, which depends on the dimensions and types of computers. He can be very necessary and convenient for long trips. Output voltage 15-24 V. Charge current 3 A. Battery pack Wispy can be charged of 12V car power-generating unit and of 110-220V.