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Best Choice as Gifts:Exquisite and Thoughtful package,High Cost-effective Battery.Enough Power for your flight. It fits UDI U818A perfectly. (can also be used in jy018 eachine e52 No plastic shell)
Capacity:3. 7V 500mAh rc drone battery, guarantee more flight time, high drain lithium-polymer rechargeable battery. The battery is made of 100% lithium cobaltate , and it has a longer charging life.
Size:57mm*18mm*7.5mm/ 2.24 x 0. 71 x 0. 3 inch,Weight:16g / 0. 56oz. Easy pull feature - easily take the battery out of the drone without pulling the cord,easy to insert and pull out battery!
Package including: 4pcs batteries, 1set 4-port charger, 4pcs adapter cables, can charge 4 batteries at one time!The charger has a very good connection with each batteries.
Warranty: 6 Month Warranty. We provide friendly after-sale service and no risk refund for our customers. If you have any issue,please contact us and we will try out best to solve your issue

Description

6 Month Warranty.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!

3.7V 500mAh Lipo Batteries for UDI U818A U817A U817 U818A-1 RC Quad Copters
This 3.7V 500mAh LiPO battery is a replacement battery.
It will give more PUNCH and ROBUST performance due to its higher current output and power.
Direct replacement battery for UDI U818A U817A U817 U818A-1 RC Drone Quadcopter, no modification is needed.

Specification:
Voltage: 3.7V
Capacity: 500mAh
Battery Type: Lithium
Cells : 1
Weight:16g / 0. 56oz(not including wires and package)
Size:57mm*18mm*7.5mm/ 2.24 x 0. 71 x 0. 3 inch

Package included:
4pcs*3.7v 500mah lipo batteries
1*X4 charger
1*usb cable
4*adapter cables

Reminder:
First,plug in the battery
Second,plug in the USB cable

Compatible with these models:
UDI U818A, U818A-1, UDI U817, U817A
WLtoys Quadcopter V959 V969 V979 V989 V999 V929 V949 V212 V222

LED Status for charger :
Red Lights on: currently charging
Red Lights off: charging complete

The instruction for charger:
1.Please inspect the batteries for any damage or swelling before charging
2.Plug all the white connector of batteries or the white connector of the converting wires into the port of charger completely
3.While the light is off ,it indicates that the batteries are fully charged.While the batteries are full,Please unplug the adapter at once

Kindly Remind
Please feel free to contact us if you have any questions, wish you have a nice day!