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Tenergy 30006 18650 2600mAh 3.7V Protected Lithium Ion (Li-ion) Flat Top Battery - Bulk

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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, 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 18650 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
  • Flat 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
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)
Internal PCB Specifications:
  • Operation Voltage
    • Min: 1.5V
    • Max: 10V
  • Excess Charge Detection Voltage
    • Min: 4.2V
    • Typical: 4.25V
    • Max: 4.3V
  • Excess Charge Release Voltage
    • Min: 4V
    • Typical: 4.05V
    • Max: 4.1V
  • Excess Charge Delay Time
    • Min: 61mS
    • Typical: 77mS
    • Max: 93mS
  • Excess Discharge Detection Voltage
    • Min: 2.437V
    • Typical: 2.5V
    • Max: 2.563V
  • Excess Discharge Delay Time
    • Min: 7mS
    • Typical: 10mS
    • Max: 13mS
  • Excess Current Detection Voltage
    • Min: 0.17V
    • Typical: 0.2V
    • Max: 0.23V
  • Excess Current Delay Time
    • Min: 9mS
    • Typical: 13mS
    • Max: 17mS
  • Short circuit Protection Voltage
    • Min: VDD-1.2
    • Typical: VDD-0.9
    • Max: VDD-0.6
  • Short circuit Protection Delay Time
    • Typical: 5ΜS
    • Max: 50ΜS
  • Consuming Current
    • Typical: 3ΜA
    • Max: 6ΜA
  • Standby Current
    • Typical: 0.3ΜA
    • Max: 0.6ΜA
  • Circuit Impedance
    • Typical: 60mQ
    • Max: 70mΩ
Battery Size:18650
Battery Capacity (mAh):2600
Battery Chemistry:Li-Ion
Battery Voltage:3.7
Battery Terminal Type:Flat Top
Battery Shelf Life:3 Years
Warranty:Battery Junction 30-Day Warranty
Return Policy:Battery Junction Return Policy
Product Weight:1.623oz
Product Dimensions:2.67" (L) x 0.709" (Diameter)
Country of Origin:China
Associated Battery Sizes:168A, 18650, 19670, Protected 18650, Unprotected 18650
14 Reviews
50% (7)
14% (2)
0% (0)
21% (3)
14% (2)
By arthur w.
Philadelphia pa
Temergy 186650 flat top.
November 23, 2020
Fits My anker lc90 model T1420 and my nitowl x001q7sxh9 both flashlights I got at amozon. Lasts a long time. Good price for a protected battery.
By Gregg
Pelham Alabama
Does not fit
July 10, 2019
Although replacing flat top battery & a call to customer service for verification (very nice & appeared helpful), none of the 7 I purchased will fit the fans using flat batteries. A lot of money spent for no return. Disappointed
By Otto G.
Olive Branch, MS
Good Product!!!
November 7, 2018
The batteries are the best. This is my second purchase and I'm very please with them. They last a long time.
By Rich
Bertram, TX
Too big
December 18, 2014
These batteries are larger tan standard 18650's both in length and diameter.
The large size of these batteries does not allow them to fit into flashlights or anything else that takes 18650's.
Completely useless and a total waste of my money.
  • Too big, makes them useless
good battery
December 8, 2014
It's a good cell. The one I got had a different label was not a flat top cell it was a button top, at least the one I got was.
  • it's protected with a pcb bottom plate
  • none
1 Question & 1 Answer
from Greensboro, NC asked:
May 28, 2014
Can this battery be recharged with my NiCad battery charger?
1 Answer
Unless your charger is compatible with Li-Ion batteries, I would not recommend charging these batteries with a NiCad charger. We carry Li-Ion chargers that will do the trick such as, the new Nitecore D2 Digicharger, Nitecore D4 Charger, or the Olight OmniDok Charger.
Submitted by: Customer Service on May 28, 2014

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