I've a defective charger for a small LED torch light, its output is 4.2V / 500mA.
I may not find an alternative one, so I'm considering modifying a mobile phone charger as following:
- The mobile phone charger has output of 5V / 1 or 2 Amps.
- I put at the output three diodes: 1N4007, and two schottky diodes of about 0.1V voltage drop each: 0.65 + 0.2 = 0.85 V
- So the output becomes: 5-.85 = 4.15V (edited )
Is this voltage adequate and suitable to charge the battery? Is it safe to use? Let me know your thoughts.
Thanks in advance