Woooooooow very very good and very good product im so happy and packaging super
I have make a remote control car
Product worked well for my Linux pc, no drivers needed, simple installation.
    
Witty Fox 3.7V 10400mAh Li-Ion Battery
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This 3.7v Lithium-Ion battery is a very slim, extremely lightweight Li ion battery based on the new polymer lithium-ion chemistry. This is the highest energy density battery currently in production. Each cell outputs a nominal 3.7v. These batteries require special charging. Do not attempt to charge these with anything but a specialized Lithium-Ion battery charger.
This Li ion Battery includes built-in protection against over-voltage, over-current, and minimum voltage. Please use caution when using this battery in wearable projects. A short in the thread can create sparks and heat when using conductive thread.
| Brand | Witty Fox | 
| Voltage | 3.7V | 
| Self–Discharge | < 2% per month | 
| Storage | -20 to +55°C | 
| Charging | Regulated DC, CCCV 4.2V | 
| Battery Capacity | 10400 mAh | 
| Battery Type | Lithium-Ion | 
| Battery Dimension (L x W x H)  | 
74 x 67 x 19 mm | 
| Connector Dimension (L x W x H)  | 
9 x 7 x 5 mm | 
| Weight | 193 grams | 
| Lithium Polymer (LiPo) Battery | Lithium Ion (Li-ion) Battery | 
|---|---|
| Lower energy density | Higher energy density | 
| High Price | Low Price | 
| Lightweight | Heavy | 
| Approx. 75% to 90% efficiency | Approx. 85% to 95% efficiency | 
| Used in power banks, mobile, laptops, Surveillance devices etc. | Uses in Drones/quadcopters, Vehicles, etc. |