This is a "fairly safe" transformerless 12V charging circuit that I put together(Still has risks like any other mains powered circuits which are not isolated). This circuit is light weight(compared to a heavy power transformer), and works extremely well. In the future I may decide to add a charging cut-off to this circuit. When a voltage of 14.25V -14.5V has been reached, all charging will stop. This method can come in very handy if you need to charge a lead acid battery when no transformer based charger is available. DO NOT TOUCH ANY PART OF THE CIRCUIT OR BATTERY TERMINALS WHILE IN USE! Make and use what's shown in this video at your own risk.<br /><br />Schematic here for a 5 amp charger:<br /><br /><a href="https://i.postimg.cc/vTXdDBsv/34zenmd.jpg" target="_blank" rel="nofollow">https://i.postimg.cc/vTXdDBsv/34zenmd.jpg</a><br /><br />**For a 10 Amp charger: Use a 200uF run capacitor / 10A 12V relay (NO/NC)/12A fuse/10A rated bridge rectifier w/ a large heatsink**<br /><br />~Conversion for use with 220V is possible , but NOT recommended!<br /><br />It is a VERY good idea to keep an electrical receptacle tester nylon tied onto the capacitive battery charger power cord to verify that the receptacle you intend to use was wired correctly before plugging in the charger. The use of a GFCI receptacle is HIGHLY recommended! NEVER touch the battery terminals or charger while the unit is plugged into AC mains!<br /><br />Looks like this:<br /><a href="http://en.wikipedia.org/wiki/Receptacle_tester" target="_blank" rel="nofollow">http://en.wikipedia.org/wiki/Receptacle_tester</a><br /><br />DISCLAIMER: WARNING, If you do not have a full understanding of how this circuit works, or you are unfamiliar with electronics OR the dangers of 120v/240v wiring, DO NOT assemble this circuit! Safety first! This circuit has the potential to KILL. This channel will not be liable for any bodily injuries, property damage, or deaths resulting from the construction of, or the use/misuse of the device shown in this video. The purpose of this video was to show how you can charge a 12v lead acid battery without using a transformer. The viewer assumes all risks if they decide to make what is shown in this video.<br /><br />**Help me make more videos by visiting the link below. All donations, big or small, would be GREATLY appreciated. Thank you!<br /><a href="http://paypal.me/electronicsNmoreYT" target="_blank" rel="nofollow">http://paypal.me/electronicsNmoreYT</a><br /><br />**For GREAT deals(Usually cheaper than EBAY) on other electronics, drones, automotive tools, household items, phone accessories, locksmith tools, & much more, please visit the link below and SAVE IT AS A BOOKMARK on your computer or smartphone to Banggood for future purchases. (Your purchase supports my channel!)<br /><br />Home Page: <a href="http://bit.ly/2wDbRdi" target="_blank" rel="nofollow">http://bit.ly/2wDbRdi</a><br />Flash Deals: <a href="http://bit.ly/2eBLkVI" target="_blank" rel="nofollow">http://bit.ly/2eBLkVI</a><br /><br />**Try these money saving coupon codes: affiliate6 or aff7off or f8aaf1 or 781622 or 5719ed or elec** or ask if other codes are available!<br /><br />Thanks For Watching!<br /><br />***If you enjoy watching my videos, please show your support by SUBSCRIBING, POSTING LINKS to my videos on other websites<br />...<br /><a href="https://www.youtube.com/watch?v=phK_nC4E_jA" target="_blank" rel="nofollow">https://www.youtube.com/watch?v=phK_nC4E_jA</a>