Uploaded April 2024 | Updated September 2026, 2 weeks ago

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Replace leaky Varta 3.6v motherboard backup battery with CR2032, 1n5711 and LM66100
PCBWay Supports High Precision Advanced PCBs: pcbway.com
PCBs at PCBWay pcbway.com/project/shareproject/Varta_to_CR2032_d81acdb0.html
Design files github.com/GadgetReboot/Varta_To_CR2032

Battery Measurements with New Battery Apr 10 2024
Apr 10 Battery: 3.23v Output after diodes: 3.08v
Apr 22 Battery: 3.00v Output after diodes: 2.85v
May 11 Battery: 2.99v Output after diodes: 2.84v
Jun 09 Battery: 2.985v Output after diodes: 2.83v
Jul 18 Battery: 2.96v Output after diodes: 2.77v
Aug 13 Battery: 2.96v Output after diodes: 2.75v
Sep 10 Battery: 2.937v Output after diodes: 2.713v
Oct 10 Battery: 2.538v Output after diodes: 2.318v ---starting to drop

LM66100 Ideal Diode ti.com/lit/ds/symlink/lm66100.pdf
1N5711 low rev leakage diode mouser.com/datasheet/2/389/1n5711-1848799.pdf
Coin cell reverse charging protection info
renesas.com/us/en/document/apn/an1535-prevent-reverse-charging-lithium-battery-meet-ul-safety-requirement
industrial.panasonic.com/cdbs/www-data/pdf/AAA4000/AAA4000COL15.pdf

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