Use this charger for Panasonic NCR18650B 2PCM 18650 Li-ion battery 3400mAh. It invites the batteries in an acceptable speed 3-5 h and works flawlessly at 110 V. However, it is often on one side full (red light), even though the battery has not yet been loaded. One must ignore it. After a while he turns around and charges the battery on. For the price all OK