Fytoo 2PCS 7.4V 2800mah Lithium Battery & 2 in 1 charger&2PCS Charging Box for HS700 HS700D aerial brushless four-axis aircraft black battery remote drone accessoriesProduct Information: Voltage:7.4V Capacity:2800mah Attention: The power indicator light is always red when the charging box is powered on; the green light flashes slowly when the battery is charged; the battery is full and the green light is on. Specifications: Guarantee more flight time, high drain lithium-polymer rechargable battery. Batteries come equipped with built-in protection mechanism for safe charging and use. The internal battery protection device installed, the user has to protect the safety, you can rest assured that the use of the item battery connector is exactly same shape with the original battery ,no loose problems Package Content: 2PCS7.4V 2800mah lithium battery 1PCS 2 IN1 Charger 2PCS Charging Box 1PCS Charging Line Note: Any questions, please no hesitation to contact with me , we will very pleasure to service for you.