Re-EMF Charger by Rene - various construction variants
The fastest charger I've ever come across.
Re-EMF Charger by Action4free: • Video
How the amperage measurement works is explained here: • Video
Plan: http://laserhacker.com/forum/index.ph...
Number of turns: 1 mm and 0.5 mm wire with approximately 15 turns
Update 12/12/2014
TheBastelwastel
7:19
If your design had 100% efficiency, the 3.5A @ 18.5V would be converted to 8A @ 8V by your charging circuit. At 6:56, you can see that your alum battery is labeled 10V. Is that its state when fully charged? Even with a faulty lead-acid battery, 7-8 volts would be quite conceivable.
8:53
The 95W—you say the power supply is overloaded, but you're measuring the current at the input and your meter reads 95W. Look at the labeling on the device again at 7:43. 85V-265V ~1.5A. 85V*1.5A = 127.5W. Overloading seems different to me? And while 50% efficiency isn't great for the power supply, judging by reviews of the device, it apparently gets quite hot. That would certainly fit. At 9:07, you can briefly see that it drew a maximum of 173W (charging capacitors &/or transformer starting up). That also seems about right.