Tenergy 3500mAh 18650 Lithium Ion Battery, per Pair Tenergy
Tenergy PN 31779 3500mAh 18650 Lithium Ion Battery, per Pair Tenergy
Tenergy PN 31779 3500mAh 18650 Lithium Ion Battery, per Pair Tenergy

Tenergy PN 31779 3500mAh 18650 Lithium Ion Battery, per Pair

We have 3 in stock.
Regular price $40.65 Sale price$29.99
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This is a rechargeable 18650 lithium-ion cell. Made by Tenergy, it is rated at 3.6V and 3500 mAh. This is a button-top protected cell, with a built in PCB.

This is part number 31779 and comes in a pair, including a hard-case clear plastic holder. These are brand new and unopened. We opened one package to check voltage, and both were right at 3.62 volts.

These lithium-ion batteries have a built-in micro-USB port & protection circuit for quick-charging on-the-go any time you need it. Plus, the protection circuit prevents over charge, over discharge, over current, and short-circuiting keeping these cells safe in all of your devices. This cell comes packed with a 3500mAh capacity, making it a great power source for flashlights and other high drain devices. There is also an LED indicator to notify you when these cells are fully charged and ready to work.

Here's a link to the data sheet.


  • 3,500mAh capacity is ideal for high-drain devices like flashlights
  • PTC prevents short circuiting, over charge, over discharge, and more
  • Red and green LED indicator alerts you when battery is fully charged


Battery Size: 18650
Battery Capacity (mAh): 3500
Battery Chemistry: Li-Ion
Battery Voltage: 3.6
Battery Terminal Type: Button Top
Packaging: Contractor Pack
Brand: Tenergy
Weight: 1.76 oz
Dimensions: 2.76" (Length) x .74" (Diameter)
MPN: 31779-18650-PR-BT
Origin: China

We ship the majority of our orders by the next business day. Lithium batteries may take up to two business days to process to accommodate inspection and logging into our system.

Our shipping rates are based on the weight of all ordered products plus estimated weight of packaging. We make every effort to forecast an accurate shipping cost, but cannot be 100% certain in all cases. Please contact us at sales@higherwireenergy.com with any questions prior to purchase.

We pack and label all lithium battery shipments in accordance with Federal Regulation 49CFR173.185, as well as USPS Publication 52 Hazard Class 9 or UPS/Fedex guidelines. Unless otherwise stated, lithium batteries are not eligible for free shipping.

We try to pack all items in an order in a single box, however we may on occasion need to ship items separately. Special shipping does not apply to lithium ion batteries, and orders that include batteries may not qualify for free or expedited shipping.

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