11.1V, 3850mAh, Li-ion Battery fits Thunderobot, 911st, St-r1, 42.735Wh

Battery Fits Models:- 911st, St-r1, St-r2, St-r3

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Battery Part Numbers:- 6-87-p640s-4231a, P640bat-3

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Cameron Sino batteries have manufactured generic batteries for many years. We offer the freshest batteries straight from the manufacturers; they are reliable and built with safety as an essential part of their construction. Our batteries from Cameron Sino are built using the highest quality components manufactured by the world's leading factory. This battery will function the same as the OEM battery. Batteries come in all shapes and sizes; quite often, a single battery model will replace hundreds of other models. The manufacturers, in their wisdom, have assigned different part numbers to like batteries. We can usually cross-reference this product to the correct replacement for you.  Batteries come in all shapes and sizes; quite often, a single battery model will replace hundreds of other models. The manufacturers, in their wisdom, have assigned different part numbers to like batteries. We can usually cross-reference this product to the correct replacement for you.  The models that this battery will fit are shown in the tables below. Check that both the model of your device and battery number match your original battery. 12 Months warranty is usually standard on all Cameron Sino products. If there is any difference in this policy, it will be stated on this page. Any misuse of the battery or modifications will invalidate the warranty. Lithium-Ion and Lithium-polymer cells usually last for between 400 and 500 cycles; Nimh cells can be charged for around 500 cycles, cycle life will vary according to several different factors. There is no set life cycle of any of these cells. Factors that influence their lives include temperature, humidity, and charges.  Our ISO 9001 certified factory uses the best quality components and manufactures its products to the exact high specifications as the OEM factory battery. We Endeavour to make our batteries meet or exceed the original batteries' specifications. Fitments that we know that this battery is shown below. Special Remarks:- None at this timePlease make sure that the device manufacturer, The model number, and the battery part number are all listed in our product details. Some manufacturers have more than one battery type fitted in like models. We recommend that you remove the original battery before ordering to confirm this. If you are not sure, we may verify for you.Do not be alarmed if the Mah (Milliamp Hour) is greater or less than the original. This figure stated is an estimation of the battery's capacity to store charge and will not affect the original equipment or charging.