1. Use 3 Ni-MH batteries in series to get 3.6V voltage for charging. Ni-MH batteries and chargers are easy to purchase. The charging voltage of the series-connected Ni-MH battery is limited to 4.2 volts, so you can use a universal charger.
2. Use a 3.6V lithium battery to charge the lithium iron phosphate battery. The 3.6 V lithium battery can be charged with a universal charger.
3. Connect a 4V battery to a germanium diode (voltage drop is about 0.3V) to reduce the voltage. You can get a 4V battery and charging circuit by purchasing a rechargeable flashlight.
4. The 5V DC output of the USB has two silicon diodes connected in series, and the voltage drop of each silicon diode is about 0.7V.
5. Use a LiFePO4 battery charger.
Other: Lithium iron phosphate batteries are relatively safe and do not exwill not collapse if overloaded.
What will happen if you use a 5V universal charger to charge a 3.7V lithium battery?
Standard voltage: 3.7 V, charging limit voltage: 4.2 V, capacity: 1500 mAh 5.55 Wh
For the safety and service life of the battery, the current should not exceed half of the battery capacity
That is, the current should not exceed 750 mA
Then buy a 4.2V-500mA charger....
You can understand that the lower the current, the higher the charger. The longer the battery life, the better it is for the battery.
The general battery specification book says 0.2C charge, which means the 1500mAh battery is charged at 300mA. .
But in China, it generally does not exceed 0.5°C, that is, not more than 750 mA. You might want to consider charging time.
Lithium batteries cannt they be loaded with. a multifunction charger? Is there any disadvantage?
If you use a 5V universal charger to charge a 3.7V lithium battery. Due to the relatively high voltage, the battery will be damaged and the battery will not be damaged. capable of storing energy. Therefore, you cannot use a 5V universal charger to charge a 3.7V lithium battery.
Note: The battery has a specified maximum voltage and current. If the maximum voltage or current is exceeded, the charger will be damaged.
First of all! I need to understand what is your concept of multi-function charging?
Lithium battery chargers can be charged as long as they are 4.2V constant current and constant voltage chargers. Of course, the magnitude of the current should be taken into account in consideration.
I wonder if the multifunction charger you mentioned isa universal charger for mobile phones. If so, you can charge the lithium battery (provided your lithium battery has a protection plate). Otherwise, it's not. It is recommended to use a universal charger to protect the card. The voltage regulation of the universal charger is not precise, and it is easy to undercharge the battery during charging or cause the battery to explode after overcharging. It is recommended to use a special lithium battery charger to charge. . .