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BackPanasonic CR-2477/VCN battery, https://industrial.panasonic.com/cdbs/www-data/pdf2/AAA4000/AAA4000D502.PDF battery CR-2477 coin cell holder CR2032 retainer clip, SMT .
- 39.5x8.3mm^2 drill 1.3mm pad 2.5mm.
- Ladder VCF ~$8 in parts, two tl074 op.
- -7.31983 0.636408 7.07423 facet normal 7.589322e-001 -6.511697e-001 0.000000e+000.