Battery For Samsung Sgh-t639, Sgh-a777, Magnet A257 3.7v, 850mah - 3.15wh

Are generic batteries as good as the original batteries you may ask, usually yes! Sometimes because of cell availability the capacity of our batteries may be slightly higher or slightly lower. This will not affect the operation of your device. If the milli Amp hour is higher that just means a longer runtime. Choosing the right battery can be an absolute nightmare and for those of you less technically inclined very difficult. We do recommend that you remove the old battery before ordering if at all possible. This really is the best thing to do. Quite a few manufacturers have 2 or 3 different types of battery fitted in one model. We can usually confirm fitment from the battery model number for you. This battery is designed to replace the battery in models described below Chemistry Li-ion Voltage 3.7VCapacity850mAh / 3.15Wh Warranty 1 Year Model Number CS-SMR520SL Color BlackDimensions(mm)40.28 x 32.71 x 6.71mmReplaces ManufacturersSamsungChoosing the right battery can be an absolute nightmare and for those of you less technically inclined very difficult. We do recommend that you remove the old battery before ordering if at all possible. This really is the best thing to do. Quite a few manufacturers have 2 or 3 different types of battery fitted in one model. We can usually confirm fitment from the battery model number for you. Confirm the fitment of this battery by checking that your model and your battery number are shown in the details below. If for any reason the product develops a manufacturing defect during the 12 month warranty period we will replace the defective item free of charge. How long will my new battery last? This is a tough one, there are many factors that will determine your new batteries longevity. As a rough guide you should get around four to five hundred charges out of your new battery. All the batteries that we supply by Cameron Sino are designed to be as long lasting as the original OEM battery. Our ISO 9001 certified battery uses high quality components and each cells rating can be seen in the table above. Actual capacity and voltage may vary slightly from the original due to cell availability. All of the known fitments for this product can be seen in the table below. Special Remarks:-Device Models and Battery numbers that this battery is known to support:-Device Models SupportedSamsung, Magnet A257, Sch-r520, Sgh-a177, Sgh-a777, Sgh-t636, Sgh-t639, Sgh-t659, Trill R520 Battery Models Supported Samsung, Ab653039ca, Ab653039cabstdManufacturers that this product will replace:- Manufacturers Supported Actual manufacturerSamsungCameron SinoBattery Selection (Please read - Important)There are so many different models of battery available today for so many different products. it's easy to make a mistake. It may be worth you confirming with us if you are really not sure which battery to order. We try to keep our records updated to the best of our ability but manufacturers can change fitment without notice.Please be advised that some higher capacity batteries are larger than the standard battery from the manufacturers. Please make sure that your model number is shown in the information above before ordering. If there is any doubt contact us first and we can advise if this is a suitable replacement for your device.