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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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$17.98 Why this price?
Cyber Monday Deal · 10% off was $19.98

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As low as $4 / mo
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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 Wednesday, Dec 3
Order within 16 hours and 52 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, headlamps, toys, 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: Wednesday, Dec 3

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.

Top Amazon Reviews


  • 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.

  • Great little batteries. Even got a building charger that you plug a USB-C cable into.
Size: 3.7V 3200mAh-2 PACK
I love these batteries. They have a little USB-C connector on one end that you plug your USB cable into to charge the battery. I got about a half a dozen of the things three of them are being used to power a small Ham radio HF rig and the others are being used With my headlight. Glad I got these. I’ll probably buy some more too. ... show more
Reviewed in the United States on October 11, 2025 by Lynn J. Magnuson

  • 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

  • Good Product.
Size: 3.7V 3200mAh-2 PACK
Worked fine in my Streamlight flashlight. Excellent price.
Reviewed in the United States on September 20, 2025 by Tbehr2008

  • Stopped working
Size: 3.7V 3200mAh-2 PACK
One of these stoped working after only a month. Not impressed by the quality of longevity of these batteries.
Reviewed in the United States on September 19, 2025 by Eric Donato

  • Save $
Size: 3.7V 3200mAh-2 PACK
Rather than pay for expensive 123c batteries I now use these. I am very pleased with these batteries, their strength and duration
Reviewed in the United States on August 7, 2025 by J States

  • Good batteries
Size: 3.7V 3200mAh-2 PACK
I needed these since my super $$$ machined aluminum flashlight wore down the battery from the company I got it from and they don’t make them anymore. Ah, well. This is better since it’s USB C rechargeable. I haven’t had it long enough to determine battery life or durability but since I don’t use that flashlight all that much I’m hoping the batteries last a long time. ... show more
Reviewed in the United States on March 11, 2025 by E. Cornett

  • slightly longer than they should be
Size: 3.7V 3200mAh-2 PACK
They work for what I need them for, but beware that they are about 2mm longer than they should be. I am using them in a laser pointer, and while it does work, the cap does not screw on all the way due to the extra length.
Reviewed in the United States on April 15, 2025 by Aaron

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