ALL BATTERIES CHARGER just use this PSU 

Make a power supply to charger all types of batteries. All types of batteries can be charged using this PSU with a voltage range between 1.4 volts to 36 volts. And this PSU can also be used as an adjustable PSU.
segments
00:00 - Opening
00:38 - Parts
00:40 - Desoldering Potentio and LED
02:28 - Trick to change potentio
05:05 - PVC Sheet Sizes
05:18 - Making a PVC cover
12:17 - Installation of Parts
13:05 - Wiring diagram
15:38 - Set Voltage xl4015
16:00 - Installation of Parts
18:52 - schematic wiring diagram
18:58 - Finishing
21:26 - Variable Voltage Test
21:58 - Voltage Calibration
22:13 - Load and current tests
22:46 - Cordless Drill Battery Charge
24:14 - Lead Acid battery charge
25:32 - Closing
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