http://www.ec21.com/ec-market/acer 3620.html http://cmpbattery.en.ec21.com/Battery_for_Acer_BTP_ARJ1--1866382_1866372.htmlACER TravelMate 2420 3240 3280 3302 3304 5540 AS5560 AS5540 AS3640, AS3620 AS3670 Compatible part numbers: BTP-AOJ20090602 http://henvleader.en.ec21.com/Repalcement_Laptop_Battery_for_Acer--3614118_3767802.html3620 BTP-ASJ1 BTP-B2J1 GARDA31 GARDA32 LC.BTP01.010 MS2180 GARDA32 Fit Machine Models ACER Aspire 2920-1A20091105 http://kw106.en.ec21.com/Laptop_Battery_for_Acer_MRD--3667059_3667347.html3620 BTP-ASJ1 BTP-B2J1 GARDA31 GARDA32 LC. BTP01.010 MS2180 Fit for laptop: Acer Extensa 3100 Acer Aspire 3600, 320090713 http://szygr.en.ec21.com/Acer_Laptop_Battery--3640357_3640385.html3620, BTP-B2J1, MS2180 Travelmate 2420,3240,3280, Aspire 3620,3624,5540,5560 Series ACER 3628 3200,TravelMate 3300,Asp20090701 http://powerall.en.ec21.com/Laptop_Batteries_For_Acer--3596434_3596435.htmlACER Extensa 3100.Aspire 3600,3620,5540,5550,5560,5590 Series,TravelMate 2420,2470,3240,3250,3280,3290,6290 Series ....20090609