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BackHolder 2xAA cell battery holder, http://www.keyelco.com/product-pdf.cfm?p=710 AA CR2 A battery holder Keystone Battery Holder, 2479, Battery Type 3xAA battery CR1225 coin cell vertical Panasonic CR-3032/VCN battery, https://industrial.panasonic.com/cdbs/www-data/pdf2/AAA4000/AAA4000D508.PDF battery CR-3032 coin cell Panasonic CR-2477/VCN battery, https://industrial.panasonic.com/cdbs/www-data/pdf2/AAA4000/AAA4000D502.PDF battery CR-2477 coin cell retainer Keystone type 3008 coin cell retainer Keystone type 2993 negative battery contact Keystone type 105 battery holder coin cell vertical Panasonic CR-2354/VCN battery, https://industrial.panasonic.com/cdbs/www-data/pdf2/AAA4000/AAA4000D486.PDF battery CR-2354/VCN coin cell retainer CR2032 BR2032 BatteryHolder Battery AA battery cell holder CR2032 retainer clip, SMT ( http://www.farnell.com/datasheets/1505853.pdf BC-2001 CR2032 2032 Battery Holder BH-331P Battery Type C Receptacle, https://gct.co/Files/Drawings/USB4085.pdf USB Type-C Receptacle SMD USB Micro-B Receptacle SMD GT-USB-7051A GT-USB-7051B USB 2.0 Type B SMT Horizontal 5 Contacts (https://katalog.we-online.de/em/datasheet/65100516121.pdf Mini USB 2.0 receptacle type B, horizontal version, through-hole, https://downloads.lumberg.com/datenblaetter/en/2411_02.pdf USB B receptacle, Horizontal, through-hole, http://www.on-shore.com/wp-content/uploads/2015/09/usb-b1hsxx.pdf USB-B receptacle horizontal through-hole USB type A, Horizontal, https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=292303&DocType=Customer+Drawing&DocLang=English USB A connector https://belfuse.com/resources/drawings/stewartconnector/dr-stw-ss-52100-001.pdf USB type A, right angle, PTS645VL58-2 LFS tactile switch with 12 positions D 3 pin Molex header Operational amplifier, DIP-8 | | | Q1, Q2, Q3 | 3 | AudioJack2 | Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling)"/>