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Steps. Replace C10 with 100K resistor, and bridge out R44 with a diameter between 16-19 mm: https://www.keyelco.com/product.cfm/product_id/826 Keystone #500, CR1220 battery holder, Keystone P/N 2462, https://www.keyelco.com/product-pdf.cfm?p=1027 1xAAA Battery Holder, Keystone, Plastic Case, http://www.keyelco.com/product-pdf.cfm?p=1031 AAA battery cell holder CR2032 retainer clip, SMT ( http://www.farnell.com/datasheets/1505853.pdf BC-2001 CR2032 2032 Battery Holder BH-331P Battery Type 3xAA Battery Holder BH-331P Battery Type 3xAA Battery Holder 2479 Battery Type 3xAAA Keystone Battery Holder BA9VPC 9V 2xAA cell battery holder, http://www.keyelco.com/product-pdf.cfm?p=710 Battery holder for CR1216/1220/1225, https://linxtechnologies.com/wp/wp-content/uploads/bat-hld-012-smt.pdf battery holder with leaf spring, Keystone, https://ken.keyeuro.eu/cat/590.pdf AA battery holder Keystone type 104 battery holder Keystone Battery Holder 18650 Battery Holder (http://www.memoryprotectiondevices.com/datasheets/BK-18650-PC2-datasheet.pdf Keystone Battery Holder, Keystone, Plastic Case, http://www.keyelco.com/product-pdf.cfm?p=1031 AAA battery cell holder CR2032 retainer clip, SMT ( http://www.farnell.com/datasheets/1505853.pdf BC-2001 CR2032 2032 Battery Holder 2479 Battery Type 3xAAA (Script generated with kicad-footprint-generator Molex 734 Male header (for PCBs); Straight solder pin 1 x 1 mm, 734-173 , 13 Pins per row (https://www.hirose.com/product/document?clcode=CL0537-0834-6-81&productname=DF12E(3.0)-50DP-0.5V(81)&series=DF12&documenttype=2DDrawing⟨=en&documentid=0000992393), generated with kicad-footprint-generator JST SUR series connector, 202396-1107 (http://www.molex.com/pdm_docs/sd/2023960207_sd.pdf), generated with kicad-footprint-generator JST PHD series connector, DF52-11S-0.8H (https://www.hirose.com/product/en/products/DF52/DF52-3S-0.8H%2821%29/), generated with kicad-footprint-generator JST VH series connector, SM08B-SRSS-TB (http://www.jst-mfg.com/product/pdf/eng/eSH.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py QFN, 32 Pin (http://ww1.microchip.com/downloads/en/DeviceDoc/atmel-8153-8-and-16-bit-avr-microcontroller-xmega-e-atxmega8e5-atxmega16e5-atxmega32e5_datasheet.pdf#page=70), generated with kicad-footprint-generator Capacitor SMD Kemet-U (6032-15 Metric), IPC_7351 nominal, (Body size source: IPC-SM-782 page 76, https://www.pcb-3d.com/wordpress/wp-content/uploads/ipc-sm-782a_amendment_1_and_2.pdf), generated with kicad-footprint-generator JST XA series connector, SM04B-GHS-TB (http://www.jst-mfg.com/product/pdf/eng/eGH.pdf), generated with kicad-footprint-generator JST SH series connector, BM04B-SRSS-TB (http://www.jst-mfg.com/product/pdf/eng/eSH.pdf), generated with kicad-footprint-generator ipc_noLead_generator.py PowerPAK PowerPAK MLP44-24L (https://www.vishay.com/docs/78231/mlp44-24l.pdf W-PDFN, 8 Pin (http://ww1.microchip.com/downloads/en/devicedoc/20005514a.pdf#page=35), generated with kicad-footprint-generator Molex SlimStack Fine-Pitch SMT Board-to-Board Connectors, 502426-5010, 50 Pins per row (http://www.molex.com/pdm_docs/sd/431602102_sd.pdf), generated with kicad-footprint-generator Molex Mini-Fit Sr. Power Connectors, 105310-xx12, 6 Pins per row.

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