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BackBR2032 BatteryHolder Battery AA battery cell holder 2xAA cell battery holder, http://www.keyelco.com/product-pdf.cfm?p=710 AA CR2 A battery holder with leaf spring, Keystone, https://ken.keyeuro.eu/cat/590.pdf AA battery holder Keystone type 1058 coin cell retainer.
- Http://www.ti.com/lit/ds/symlink/lm3404.pdf 8-pin HTSOP package with 1.27mm pin.
- 254-EMB84Q-RO https://www.mouser.es/datasheet/2/209/KT-400385-1171904.pdf Buzzer Magnetic.