charger: Output Voltage: 5.0 , 500mA
battery:20 volts 3.95amps
Your specification of the battery is incorrect or at least incomplete. You need the correct charger, and a 5-volt one certainly will not work.
Proper specification of a battery would include:
- Purpose--what's the intended use? What are YOU using it for?
- Voltage
- Chemistry (lead-acid, lithium, nickel-cadmium, etc.)
- Physical size
- Rating in amp-hours or milliamp-hours
- Expected charging current (What does the manufacturer recommend?)
Attempting to charge at too low a voltage is like wishing that water would flow uphill. On the other hand, too high a voltage will likely ruin the battery. A proper battery charger will often limit or cut off the charging current when the battery is completely charged.
No it won't work at all. The charger has to put out more volts than the battery.
No, it will likely fry the charger. To charge it will need more volts than the battery. You will need the right battery charger for it. Or at least one that can charge a 20v battery.
Ohm's law says nope that ain't gonna work!
Basically stated it takes a volt to push an amp across an ohm worth of resistance.
charging voltage thewn must be higher than battery voltage or it cannot charge!
i have a 5v charger will it charge a 20 volt battery?
charger: Output Voltage: 5.0 , 500mA
battery:20 volts 3.95amps
