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AstroAI A1500 6V&12V 1.5AMP Automatic Battery Charger/Maintainer Manual 

 

Thank you for purchasing the A1500 Battery Charger/Maintainer from AstroAI. This

 

Battery 

Charger/Maintainer is a 4 stages smart battery charger by Microprocessor controlled with switch mode 

for 6V and 12V selectable output .it is ideal for charging your CAR, MOTORCYCLE AND RIDE-ON 

TOY batteries, suitable for type of batteries including AGM GEL VRLA SLA WET and deep-cycle. 

For optimal performance and safety, please read and follow all of the instructions below before 

operating the device. Please keep this manual for future reference. We hope you enjoy your new

 

Battery Charger/Maintainer! 

 
4-Stage Charging Process 

 

Stage 1: 

Initialization, when the charger is power on, it starts self-check and detects the battery correct 

connection. When output voltage is low without battery, the 

Fault LED is lighting, please 

MAKE SURE THE POLARITY IS CORRECT. 

 

Stage 2: 

Bulk charge, using the charger’s highest rated current for the type of battery in use until it 

reaches the capacity at 80%. 

( LEDs 50% Blinking ,100% OFF) 

 

Stage 3: 

Absorption, the output voltage is limited to 7.3V (6V battery) or 14.5V (12V battery) while 

current declines as the battery charges to its full capacity without overheating 

( LEDs 50% 

ON ,100% Blinking) 

 

Stage 4: 

Float, At this stage, the battery is fully charged and the charger maintains the power through 

pulse charging 

( LEDs 50% ON ,100% ON) 

 
 
 
 
 

 
 
 
 
 
 
 
 

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