can a 1.5 amp charger charge a car battery

[SanEdward]

Yes, a 1.5-amp charger can charge a car battery, but it is an extremely slow method best suited for long-term maintenance charging rather than quickly reviving a dead battery. This type of charger is often called a trickle charger or battery maintainer. The primary factor is time. A typical car battery has a capacity of around 48 amp-hours (Ah), which is a unit measuring electrical charge capacity. To fully recharge a completely dead 48Ah battery with a 1.5-amp charger, you would need approximately 32 hours of continuous charging (48 Ah / 1.5 A = 32 hours).

This method is highly effective for keeping a battery topped up during seasonal storage or for vehicles that are infrequently driven, as it prevents self-discharge without the risk of overcharging. However, it is impractical if you need the car running quickly. For a faster charge, a standard automotive charger delivering 10-15 amps would be necessary. Always ensure the charger is connected correctly (positive to positive, negative to negative) and in a well-ventilated area, as charging batteries produce hydrogen gas.

Battery Capacity (Amp-Hours)	Estimated Full Charge Time with 1.5A Charger (Hours)	Common Vehicle Type
36 Ah	24 hours	Compact Car
48 Ah	32 hours	Mid-size Sedan
60 Ah	40 hours	Small SUV/Truck
72 Ah	48 hours	Large SUV/Truck
90 Ah	60 hours	Diesel Engine Vehicle