Battery plug : MX2.0, or called XH2.54 plug. USB Charger cable buit-in over-charged protection circuit, Red light is solid when charging, red light is off after full charged.
Battery Real Capacity: 1S 3.7V 650mAh---800mAh. USB charge cable input: 5V 2A, output 4.2V 0.5A.
Battery dimensions: 51*18*14.3mm /2.0*0.7*0.56inch,, net weight: 20grams. 3.7V 650mAh Battery suitable for fygurso 208000 Remote Control Sharks.
3.7V 1S 650mAh Li-ion rechargeable battery suitable for Skytech TKKJ H116 Remote Control Boat,
3.7V 1S Li-ion Battery Suitable for Dwi Dowellin Y878 Robot Dog Remote Control Robot Dog, which use same MX2.0 white 2 pin plug battery,same size too.
3.7V 1S 650mAh Li-ion rechargeable battery replacement for some kind RC Boat. Battery also replacement for YEETFTC H116 RC Boat.