✉If you have any issue with our products,please contact us by email or ask the question on the product page.We will try our best to solve your problem!✉ ✿7.4V 350mAh Lipo Batteries for for UDI U31 U31W U36 T25 U31R AA108 Remote Control Helicopter Battery This 7.4V 350mAh LiPO battery is a replacement battery. Direct replacement battery for UDI U31 U31W U36 T25 U31R AA108 Remote Control RC Quadcopter, no modification is needed. ☛Specification: Voltage: 7.4V Capacity: 350mAh ☛Product Description: This 7.4V 350mah lipo battery is a replacement battery ☛Compatible with these models: UDI U31 U31W U36 T25 U31R AA108 ☛Package Included: 2pcs*7.4v 350mah lipo batteries ☛Kindly Remind Please feel free to contact us if you have any questions, wish you have a nice day!❣