6Pcs 3.7V 520mAh 25C LiPO Batteries for Hubsan X4 RC QuadCopter:,no modification is needed.
These LiPo batteries offer high quality and long lasting flight time with 520mAh for about 7-8 minutes of flight. (may vary by drone models)

●BATTERY SPECIFICATION:
Capacity: 520mAh
Voltage: 3.7V
Constant Discharge Current: 5.7A (15C)
Discharge Cut-off voltage: 3.0V/Cell Max.
Constant Charge Current: 760mA (2C)
Charge Cut-off Voltage: 4.2V/Cell
Continuous discharge rate:25C
Product Dimensions:4.3 X 1.9 X 0.8inches
Net Weight:0.45oz
Charge Time: between 40-50min to fully charge.

●Battery Compatible with these models:
Hubsan X4 (H107C)
Hubsan X4 (H107D)
Hubsan X4 (H107L)
JJRC H22 H6D
Holy Stone HS170 HS170C F180C
Syma X11 X11C
Walkera Super CP
Walkera Mini CP
Walkera Genius CP

●This 6 in 1 Intelligent Charger for 3.7V Lithium RC Batteries,charging 6 batteries at one time,save your time.
●Battery Charger Specifications:
Input: DC 5V
Size: 1.81 x 1.38 x 0.53 inch
Net Weight: 0.39 oz

●Battery Charger Features:
Advance individual charging method - charges each cell individually
Overcharge protection
Short-circuit protection
Light weight and super easy to use

●LED Status:
Red Lights on: currently charging
Red Lights off: charging complete
So when you find the light is not bright,pls don't angry.Maybe batteries are fully.

●Caution:
.The battery is charged and discharged once every 3 months in the long-term storage process to keep the battery activity.
.Stop using when it expends or the temperature is over 70°C.
.Don't over-charge, or over-discharge batteries.
.Do not bump,disassemble, short circuit and put the battery in fire or water.

●PACKAGE INCLUDED:
6 * lipo rechargeable battery
1 * X6 battery charger
1 * USB charging cable

• ●Longer Flight Time:Real Capacity 3.7V 500-520mAh Rechargeable Lipo battery,guarantee more flight time,high drain lithium-polymer rechargable battery,with built in protection IC
• ●Direct Replacement Batteries for Hubsan X4 (H107, H107C, H107D, H107L, V252, JXD385,JJRC,H6C,H22,H6D,Syma X11 X11C) 4 Channel 2.4GHz RC Quad Copter (61145),Also compatible with Walkera Super CP,Walkera Mini CP,Walkera Genius CP,Holy Stone HS170 HS170C F180W F180C,no modification needed!
• ●This Fast smart Charger: input: DC 5V;output: 4.2V,charging 6 batteries(3.7V) at the same time ,over charging protection and Short circuit protection,compatible with most Micro RC Helicopter & Airplane 1S Batteries: UDI U815, U816A, U818A; Wltoys V929, V949, V959; Syma X1, X4, X5C; MJX T04, T05, F28, F29; Hubsan H111, H107L, H107C, H107C-HD, H107D and more.
• ●More PUNCH and ROBUST performance due to its higher current output and power.Obtain longer flight time.
• ●Numbering Space - Dedicated space for battery numbering allow for easy management.

●Longer Flight Time:Real Capacity 3.7V 500-520mAh Rechargeable Lipo battery,guarantee more flight time,high drain lithium-polymer rechargable battery,with built in protection ICECOGREEN