In this video I will show you how to build a simple lithium battery protection circuit, so you can power your homemade projects without ever worrying about over discharging your battery. Circuit diagrams: https://www.dropbox.com/s/5e0otr2dg7uf14x/DIYPerks%20Battery%20Protection%20Circuit.zip?dl=0 How to use lithium batteries safely: http://www.maxamps.com/lipo-care.php More info on battery measurements: https://www.youtube.com/watch?v=cxkVxi9P0EA Parts links: Disclosure: These are affiliate links. If you click them and make a purchase from the various merchants they link to, DIY Perks may earn a commission. Affiliate programs and affiliations include, but are not limited to the eBay Partner Network and Amazon Associates. Alarm circuit: http://www.ebay.com/sch/i.html?_from=R40&_sacat=0&_sop=15&_nkw=lipo+alarm&rt=nc&LH_BIN=1 Relay: DSP1a-L2-DC5V http://www.google.com/search?q=dsp1a-l2-dc5v (select one of the distributors - price is around $5) OFFICIAL LINKS: Support me on Patreon: https://www.patreon.com/DIYPerks/ Official Website: https://www.diyperks.com/ Discord: https://diyperks.com/discord-server/ Forums: https://diyperks.com/community/ Twitter: https://twitter.com/DIYPerks Music by Kevin McLeod and Löhstana David