battery voltage ( 4v 10% = 4.5 / 5 volt ) Please do not try to fast charge with extra current voltage else it will get damage. Please follow the charging rules for SMF lead acid battery. Can also charge with any standard mobile charger (of 5 volt ) with adding a diode and 10 ohm / 0.5w resister in series ( limit the current to 100ma)
4v 1000mAh(1.0Ah) Rechargeable Battery. Livon RB410- 4V 1.0 Ah Lead Acid Battery. 4V 1Ah Sealed Lead Acid Rechargeable Battery for UPS Emergency Light TOYS 4V 1500mAh Sealed Lead Acid Battery

Crystal Oscillator
Diode
Inductors

Electronic Amplifiers
Speaker’s
Buzzer-Speakers
Arduino
Raspberry Pi
PCB Board
PCB Service
Ceramic Capacitors
Electrolytic Capacitors
Polyester Capacitors
SMD Capacitors
Carbon Film Resistors
Network Resistors
SMD Resistors (0805)
Switch
THYRISTOR
PIC or DSPIC



Lights

Sensors
Transformer
Adapter
Motor’s
Battery

Fuse
Relay

Variable Resistors / Potentiometer
Wire
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