5Pcs 3.7V 380mAh 25C LiPO Batteries for Hubsan X4 HS170G TOZO Q2020 E016H E016F FX801 V911S A120 XK A150 V966 RC QuadCopter:,no modification is needed.
These LiPo batteries offer high quality and long lasting flight time with 380mAh for about 6-8 minutes of flight. (may vary by drone models)

Battery specificastion:
Capacity: 380mAh
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:3.6 X 1.9 X 0.75inches
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
HS170 HS170C F180C HS170G TOZO Q2020
Syma X11 X11C FX801 V911S A120 XK A150 V966
Walkera Super CP
Walkera Mini CP
Walkera Genius CP E016H E016F

This 5 in 1 Intelligent Charger for 3.7V Lithium RC Batteries,charging 5 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:
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,please 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 include:
5* lipo rechargeable battery
1 * X5 battery charger
1 * USB charging cable