Soshine 4 in 1 US / UK / EU / AU Universal 220/240V to 110/120V Converter and Plug Set Adapter CHA_069

The Rear Battery Color is Black or Silver.Battery Dimensions is 425*160*80mm.The style is Rear Rack style, It is mounted above the bicycle Rear hanger

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USB Ports:10 or more; USB Type:USB 2.0; Design:Professional; Color:Silver; Dimension (cm):19 x 2.2 x 3.7; Net Weight (kg):0.1026

- This accessory will fit any car, truck, or boat cigarette lighter or 12v outlet. - Fits standard 12V plug - Made of durable plastic - Red indicator LED

Free Tax 52V 15AH Lithium Battery 52V 15AH Electric Bicycle Battery 51.8V Scooter Battery for 48V 500W 750W 1000W Bafang Motor

charge with constant current 1C to 4.2V, then charge with constant voltage 4.2V till charge current is less than 0.01C