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Witty Fox

Witty Fox 3.7V 4000mAh Li-Ion Battery

Witty Fox 3.7V 4000mAh Li-Ion Battery

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Regular price Rs. 299
Regular price Rs. 349 Sale price Rs. 299
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  • This is Witty Fox 3.7V 4000mAh Li-Ion Battery
  • Compatible with a wide range of electronic devices and applications, including GPS, DVD players, power banks, Bluetooth speakers, and industrial applications
  • Features pack over-voltage protection, pack under-voltage protection, and individual cell over-voltage protection to safeguard the battery and connected devices
  • Provides over load protection, over current protection, and short circuit protection for safe and reliable operation
  • Includes under-voltage protection for individual cells to ensure a balanced charge and prolong the battery's life
  • Comes with reverse polarity protection to prevent damage from incorrect installation.

Witty Fox 3.7V 4000mAh Li-Ion Battery

The Witty Fox 3.7V 4000mAh Li-Ion Battery is a rechargeable lithium-ion battery that is extensively utilized in electronic devices like GPS, DVD, Tablet PC, MP4 Player, Power Bank, Mobile Backup Power Supply, Bluetooth Speaker, IOT, and Industrial applications. This li ion battery is equipped with various features such as pack over-voltage protection, pack under-voltage protection, over-voltage protection, cell under-voltage protection, and cell protection.


  • Pack over-voltage Protection
  • Pack under-voltage Protection
  • Over voltage Protection, CELL
  • Under-voltage Protection, CELL
  • Over Load Protection
  • Over current Protection
  • Short circuit protection
  • Reverse Polarity Protection


1 x Witty Fox 3.7V 4000mAh Li-Ion Battery


Brand Witty Fox 
Voltage 3.7V
Battery Capacity  4000 mAh
Battery Type Lithium-Ion
Dimensions  37 x 19 x 68mm
Weight  100 grams

Shipping & Returns

  • All orders confirmed before 3 pm IST are shipped on the
    same day, barring rare pickup delays on holidays or disturbances
  • Delivery time in Metro cities is 1-3 days, Others it is
    3-7 days. It varies based on location, reliant on courier services
  • Return window: 7 days from receipt unless stated
    otherwise. No refunds/replacements after
  • Returns only for non-working/damaged products are accepted
  • Initiate return requests to our customer service team via Support ticket or contact us at +91-8123057137
  • Refunds are processed within 3-4 working days post inspection and approval.

For more details, please check our Shipping and Return Policy

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1.How long does a 3.7 V lithium battery last?

  • The lifespan of a 3.7 V lithium battery will depend on a variety of factors, including the type of battery, its capacity, the load placed on it, and the operating conditions it is subjected to. In general, lithium batteries have a longer lifespan than other types of batteries, but their performance can still degrade over time. The 3.7V lithium battery will last upto 800 cycles.

2.What is 3.7 V lithium battery?

  • A 3.7 V lithium battery is a type of rechargeable battery that uses lithium as the cathode material. These batteries have a nominal voltage of 3.7 volts, which means that they are designed to produce a voltage of around 3.7 volts when fully charged. Lithium batteries are commonly used in a wide variety of electronic devices, including smartphones, laptops, and tablets, due to their high energy density, low self-discharge rate, and long shelf life.

3.What is the price of 3.7volt battery?

  • A number of factors can influence the cost of a 3.7 V lithium battery. One of the most important price factors is the battery size, which is measured in milliampere-hours (mAh). Higher capacity batteries, measured in mAh, are typically more expensive than lower capacity batteries. The 3.7V 4000mAh Li-Ion Battery costs around 329 - 417Rs/- at robocraze. You might be able to get a better deal if you buy in bulk from an online retailer.

4.How do you charge a 3.7 V Li-ion battery?

  • To charge a 3.7 V lithium-ion (Li-ion) battery, you will need a lithium-ion battery charger that is compatible with the battery. Here are the general steps for charging a 3.7 V Li-ion battery:
    • Connect the charger to a power source, such as an electrical outlet or USB port.
    • Connect the battery to the charger using the appropriate charging cable or adapter.
    • Follow the instructions provided by the charger and battery manufacturer to ensure that the battery is charged properly. Some chargers may have a charging indicator light or display that shows the status of the charging process.
    • Leave the battery to charge until it is fully charged. The time it takes to charge a 3.7 V Li-ion battery will depend on the capacity of the battery and the charging rate of the charger.