• Wide compatibility: Compatible with series 500, 600, 700, 800, including specific models such as 500, 505, 510, 520, 521, 530, 531, 532, 533, 534, 535, 536, 540, 545, 550, 552, 555 PET, 560, 561, 562, 563 PET, 564 PET, 565, 570, 580, 581, 585, 587, 589, 595, 599, 600, 605, 610, 616, 620, 621, 625, 630, 631, 632, 639, 650, 651, 660, 700, 720, 750, 760, 765, 770, 772, 772e, 774, 775, 776, 776p, 780, 782, 782e, 785, 786, 786p, 800, 865, 866, 870, 871, 875, 876, 880, 886 R3 80501 4419696. • Large capacity: Voltage of 14.4V and capacity of 4050mAh, Ni-MH battery type. • Durability: Up to 1000 usage cycles thanks to its advanced chip design and deep discharge protection. • Long-lasting: Greater capacity than the original 3200mAh battery, operating from 1.5 to 3 hours after a full charge. • Multiple protection: Protection against overcharges, deep discharges, and overheating. • Content: Includes 1 morpilot 4050mAh battery compatible with series 500, 600, 700, 800.