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NERMAK

3.7V 3200mAh USB Rechargeable Lithium lon Battery for Flashlights, Headlamps, Bike Lights, Bluetooth Speaker Etc(2 Pack)

  • Based on 207 reviews
Condition: New
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To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

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Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Feb 22
Order within 8 hours and 45 minutes
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Size: 3.7V 3200mAh-2 PACK


Features

  • Superior Performance:Built-in USB-C port, support C-C output, you can charge your cell phone and other devices in case of emergency, easy to charge with the included 2-in-1 USB cable, no need for an additional battery charger (does not support PD fast charging)
  • Widely Uses:NERMK 3.7V rechargeable batteries are suitable for flashlights(High-power flashlights are not suitable), headlamps, remote controls, microphones, radios, bike lights, bluetooth speakers, and other household devices.
  • Safe and Efficient: NERMAK 3.7V battery has built-in safety protection against overcharging, over-discharging, over-current and short-circuit, with 1500+ charging cycles for longer service life, making it an ideal replacement battery for high-frequency equipment.
  • Warm Note: 2* 3.7 Volt Replacement lithium ion battery,12 months warranty, If you have any question for our product, Contact us: click the "Ask a question" on our storefront or in "YOUR ORDER" options click the "contact seller"

Number of Batteries: 1 Lithium Ion batteries required. (included)


Brand: NERMAK


Battery Cell Composition: Lithium Ion


Battery Capacity: 3200 Milliamp Hours


Recommended Uses For Product: Flashlights


Product Dimensions: 2.85 x 0.75 x 0.75 inches


Item Weight: 4.6 ounces


Item model number: 18700


Batteries: 1 Lithium Ion batteries required. (included)


Is Discontinued By Manufacturer: No


Date First Available: June 18, 2023


Manufacturer: NERAMAK


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Feb 22

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • includes a charger!
Size: 3.7V 3200mAh-2 PACK
Very cool product. My bike light that used this format was unreliable on charging. This battery with its usb C port built in mad that a non issue. Very cool and very long burn. Love it so far.
Reviewed in the United States on December 16, 2025 by Skarv
    • Great value!
Size: 3.7V 3200mAh-2 PACK
Fantastic investment! Works flawlessly!!
Reviewed in the United States on December 26, 2025 by James M Rutland
    • Battery
Size: 3.7V 3200mAh-2 PACK
I received the batteries the other day. After charging them one battery didnt work. The company reached out to me and i explained that after charging one battery didnt work. They sent out 2 new ones for me. I really appreciate the customer service! The battery did work very well for what i needed it for. Thank you again! ... show more
Reviewed in the United States on September 15, 2025 by Keith F.
    • Rechargeable batteries
Size: 3.7V 3200mAh-2 PACK
These batteries are easy to use and work with all of the correct usb charger they charge quickly and the battery has lasted a long time without recharging!
Reviewed in the United States on February 13, 2024 by Leslie
    • One of the batteries burnt up on 2nd charge.
Size: 3.7V 3200mAh-2 PACK
One battery only charged up one time. On the 2nd charge it got a little hot and smelled. It won't charge anymore.
Reviewed in the United States on January 4, 2026 by Randy Pimley
    • Good Quality and Price
Size: 3.7V 3200mAh-2 PACK
Great Product. Came as described and easy to charge. The price was good, so I bought the two pack and have a battery always charged.
Reviewed in the United States on December 21, 2025 by Don Shively
    • Highly recommend this seller.
Size: 3.7V 3200mAh-2 PACK
Secure Check out . Seller has high quality merchandise at a fair price and packs each item securely, in a waterproof package, with adequate padding to protect it in shipment. Fast to get the package out & on its way. Photos are always highly representative & allow the item to be viewed so it always arrives as described. ... show more
Reviewed in the United States on December 11, 2025 by marvertom
    • Good non oem option
Size: 3.7V 3200mAh-2 PACK
These batteries work well and seem to hold a charge as long as the oem ones that came with my light. Time will tell if they last and have a long life. The carry storage case is a nice option
Reviewed in the United States on January 6, 2026 by Rob H.

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