On Order I-blue Gps, Navigator Battery Li-ion Battery fits I-blue,820,821 3.7V, 770mAh CS-ITB820SL $27.79 Quality components are important for the efficient and smooth operation of your battery. We always use the best parts. Ideally both your model number and battery number are listed in the product description if this is the case you can be almost certain that you are ordering the correct battery. If we say it will fit and both these pieces of information... Add to cart