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Tenergy 3.7V 2600mAh Li-Ion Rechargeable Battery 18650 - Button Top

Tenergy 18650 2600mAh 3.7V Protected Lithium Ion (Li-ion) Button Top Battery - Bulk (30016)
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Item #:TENERGY-30016-18650-PR-BT
Product Review:
Regular Price:$8.95
Sale Price:$7.95 & Free Shipping
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1 - 3$7.95 ea.
4 - 49$7.75 ea.
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Tenergy 18650

3.7V 2600mAh Li-ion Battery

This high energy density and capacity lithium-ion battery from Tenergy is perfect for flashlights, electronic cigarettes, portable power devices or other devices requiring 3.7 volts. The 3.7 Volt 2600 mAh capacity provides a long lasting, efficient discharge for maximum runtime for your flashlight or other device. The lightweight 18650 cell has been tested by the IEC (International Electrotechnical Commission) standard to ensure capacity, quality, and life span, so there are no surprises. Also, this 18650 has been manufactured under the ISO9001-2000 standard to assure top notch quality. These 18500 supply three times the voltage of 1.2V AA NiMH or NiCd rechargeable batteries. The unique patented PCB design prevents voltages outside of 2.5-4.25 volts

Note: These fully protected cells simplify usage with their integrated PCB. Perfect for your single cell application these cells are not for pack building as doing so will defeat the PCB protection which is matched to the correct voltage on a single cell. If you are building a pack please choose one of our other cells and the appropriate PCB.

Features and Benefits
  • Unique and New! With integrated PCB Protection!
  • Lithium Ion 18650 cylindrical rechargeable batteries
  • Button top terminal
  • Internal PCB protection prevents under-voltage at 2.5V and over-voltage at 4.25V.
  • Unique PCB design and patent pending.
  • Higher energy density and lower weight than other types rechargeable batteries
  • Manufactured under ISO9001-2000 to assure quality
  • Battery tested based on International Electrotechnical Commission (IEC) standard to ensure capacity, quality and life time
  • Lighting or other device needing 3.7V power
  • Building portable power device needing high energy density and low weight
Product Specifications:
  • Capacity: Nominal 2600 mAh, Minimum 2450 mAh
  • Internal PCB protection prevents under-voltage at 2.5V and over-voltage at 4.25V.
  • Dimensions:
    • Diameter 18+/-0.2 mm
    • Height 67+/- 0.2mm
  • Weight (Typical) Approx. 46 g
  • Nominal Voltage: Average 3.7V
  • Cut-off Voltage: 2.5V
  • Internal Impedance: less or equal to 180 mΩ (with PTC)
  • Cycle Performance: 90% of initial capacity at 400 cycles
  • Cycle life: > 500 cycles
  • Charge: Current = 0.5C, Voltage = 4.2V, End Current = 0.01 mA
  • Discharge: Current = 0.5C, End Voltage = 3.0V
  • Max. Charging current: 1.5C
  • Max. Discharging current 1.5C (for continuous discharge)
  • Data Sheet

Internal PCB Specifications:

Parameter Minimum Typical Maximum Unit
Operation Voltage 1.5 10 V
Excess Charge Detection Voltage 4.2 4.25 4.3 V
Excess Charge Release Voltage 4 4.05 4.1 V
Excess Charge Delay Time 61 77 93 mS
Excess Discharge Detection Voltage 2.437 2.5 2.563 V
Excess Discharge Delay Time 7 10 13 mS
Excess Current Detection Voltage 0.17 0.2 0.23 V
Excess Current Delay Time 9 13 17 mS
Short circuit Protection Voltage VDD-1.2 VDD-0.9 VDD-0.6 V
Short circuit Protection Delay Time 5 50 μS
Consuming Current 3 6 μA
Standby Current 0.3 0.6 μA
Circuit Impedance 60 70

NOTE:Use special caution when working with Li-ion cells, they are very sensitive to charging characteristics and may explode or burn if mishandled. Make sure the user has enough knowledge of Li-Ion rechargeable batteries in charging, discharging and assembly before use. Always charge in/on a fire-proof surface. Never leave charging batteries unattended. We are not responsible for damage if there is any modification of the batteries/chargers in any form or shape (including pack making). We are not responsible for any damage caused by misuse or mishandling of Li-Ion batteries and chargers. We only recommend using Lithium Ion rechargeable batteries with a control circuit (protection PCB) to assure safe charge, discharge, etc., use of lithium ion batteries without a protection circuit is potentially hazardous.

More Information:

If your device requires batteries with a button top design, Tenergy 18650 2600mAh lithium ion batteries are an excellent choice. These fully protected cells are best used for single cell applications and not for pack building. Tenergy 18650 rechargeable batteries are 3.7V and the capacity on these cells is considered nominal. The PCB protection is internal and unique to the Tenergy line of rechargeable cells. This Tenergy model battery weighs approximately 46 g and has more than 500 life cycles.

Battery Size:18650
Battery Capacity:2600mAh
Battery Chemistry:Li-Ion Rechargeable
Battery Voltage:3.7
Battery Terminal Type:Button Top
Battery Shelf Life:3 Years
Warranty:Battery Junction 30-Day Warranty
Return Policy:Battery Junction Return Policy
Product Weight:1.76oz
Country of Origin:CN
Tenergy 18650 2600mAh 3.7V Protected Lithium Ion (Li-ion) Button Top Battery - Bulk (30016)
4 Stars based on 7 Review(s)
Quitman, TX
3 Stars
I would recommend this item to a friend.

Tenergy 3.7 18650 2500mAh
February 13, 2015
It's O.K. but you can spent a little more and get a better Battery

Woonsocket, RI
5 Stars
I would recommend this item to a friend.

Lasts very well in a high draw application (flashlight ~300 lumens)
December 21, 2014
I've been using these for more than a year and I'm very pleased with the runtimes and quality of the units. I have not had a failure, leakage, etc. I am using the Tenergy charger for them. I don't have the ability to test the rated capacity, that would be nice to see. The longest I've continuously used my high-draw flashlight is maybe 15 minutes continuously because I don't much trust the heat sinking on it, but I'd estimate about a 2 hour runtime at roughly ~300 Lumens in my flashlight.
Ad advertised, long run time. Recharged dozens of times and use almost daily for a few minutes a day.
None noted.

New Braunfels, Texas
5 Stars
I would recommend this item to a friend.

Tenergy 3.7V 18650 2600mAh Li-Ion Rechargeable Battery
September 9, 2014
Excellent product at a reasonable price that was shipped immediately and arrived in a few days.
After charging, this battery seems to last for quite a long time
A storge case for extra batteries would be helpful.

Niagara Falls, NY
5 Stars
I would recommend this item to a friend.

worth the money
August 15, 2014
2600mAh of power and the price is right for these 18650 batteries.

Kansas City, MO
3 Stars

Not quite sure
May 25, 2014
Ordered six of these batteries a couple months back. Having pretty good luck until apparently I try using one that I hadn't tried in any of my flashlights yet. Totally dead in three different flashlights and after trying to re-charge it twice. So make sure you check every battery of these you order right on the day you receive them. Or like me, you will be stuck with a brand-new battery that is worthless, and you won't have any recourse into sending it back for a replacement.

United States
5 Stars
I would recommend this item to a friend.

Worth the money.
May 20, 2014
I have 15 of these and use them regularly. I have all the big lights, such as the TN30, TN32, V5, Lynx, k5, etc. I use them and push them hard. Out of all the batteries I've had no problems with any of them. So for the money, they are not Eagletacs, but they perform pretty well, you can't out any battery and leave in a charger for months, treat your tools properly and they will work.

2 Stars

50% Great
May 9, 2013
I got four of the Tenergy 18650 button top batteries in September of 2012 (#30016). I have not used them much, since they are for a night search light. I have had them in a Sysmax Inlellicharge i4 for the past 8 months. Two of the four batteries have gone bad and will not charge anymore. One of the two is even distorted a bit. The other two seem to be working just fine. Of course, the warranty is three months.

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