The Correct Blue Tip Charger for HP Laptops Not all HP chargers are the same. If your original adapter reads: 18.5V – 3.5A (65W) and uses the small 4.5mm Blue Tip smart pin, this is the correct replacement type. Using the wrong tip size will not fit. Using lower wattage can: Slow charging Affect performance Drain battery while plugged in Built for Everyday Work & School Perfect for: HP ProBook HP EliteBook HP Pavilion Other supported HP notebooks using 4.5mm blue tip Supports 100–240V input — suitable for Nigerian power supply. Reliable Indoor Charging. Designed strictly for Indoor use. IT equipment. Office and home setup. If your charger is: not charging, overheating, cable torn, or completely lost. This 65W HP adapter restores your laptop to working condition.