3.7V, 350mAh, Li-Polymer Battery fits Syma, X21, X21s, 1.295Wh

Battery Fits Models:- X21, X21s, X21w

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Battery Part Numbers:- CS-SMX210RC

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The battery shown on this page is manufactured using the highest quality parts. If you are worried about the quality or the performance of the products from Cameronsino, take a look at the reviews from our customers. Sound quality is assured as the products are manufactured to a very high standard  If you are not sure which battery you need to order, contact us first. We can confirm the fitment for you. Please be prepared to give us as much data as possible to decide the best product for your device. If you are not sure which battery you need to order, contact us first. We can confirm the fitment for you. Please be prepared to give us as much data as possible to decide the best product for your device. Our replacement batteries are designed to replace the models that we list in our tables below.  Most of our products come with a one-year warranty unless otherwise stated. The one-year warranty that we offer covers any manufacturing defect. Please note that the warranty does not cover damages due to misuse of the battery nor diminishing run time due to normal wear and tear. Different chemistries of batteries have other cycle lives; Li-Ion usually lasts for around 400 to 500 cycles, Lithium Polymer is the same. Nimh batteries will usually last for about 500 cycles. A cycle is a full discharge and recharge of the battery. How can I be sure that this battery is safe? ISO 9001 certification means that our factories never take shortcuts with the manufacture of our batteries. All safety components are included. This ensures the safe, trouble-free operation of this replacement battery. The specifications should be the same as or better than the original.  This product is designed to replace batteries, as shown in the specifications table 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.Mah is the figure that estimates the charge that a battery will hold. The higher the Mah, the longer the runtime.