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UltraFire UF 17670 1800mAh 3.7V Protected Lithium Ion (Li-ion) Button Top Battery - Bulk

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These cells are sold individually.

Protected 17670 cell, 1800mah.
  • Capacity: 1800mAh
  • Rechargeable for 600-800 times
  • Voltage: 3.7V
  • Temperature: -40C~60C
  • Dimensions:
    &nabs; Diameter 17+/-0.5 mm
    &nabs; Height 68+/-0.5 mm 
  • Maximum charge/drain rate: 1.5C
  • Over-charging protection point: 4.2V
  • Over-discharge protection point: 2.75V
  • Internal resistance: <= 120 mohm
  • Protection Kicks In: @2.75V and @4.2V
  • Optimal charging temperature: 0~45'C
  • Optimal usage temperature: -20~60'C
  • Optimal storage temperature: -20~60'C (65% humidity)
Battery Size:17670
Battery Capacity (mAh):1800
Battery Chemistry:Li-Ion
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 Dimensions:2.73" (L) x 0.66" (W) x 0.66" (H)
Country of Origin:China
9 Reviews
67% (6)
22% (2)
0% (0)
11% (1)
0% (0)
By Ray
Central NY state
Battery Seems Fine...
April 5, 2021
I bought this 17670 battery to replace two cr123 batteries in my older model streamlight protac HL headlamp. While the battery fits fine, the voltage is too low and the light does not work. This is no fault of the battery. This headlamp requires the voltage of two cr123 batteries in series, 6v, to operate.
By Richard
Does not power my older SureFires
June 21, 2020
Does not work in my (late 80s? early 90s?) 6P or early 90s 12Z SureFires. But I do have a (mid 90s?) 6Z that it powers, although not as bright as 2 CR123s (which is ).
By Mark
Rohnert Park, CA
Works like a charm
April 2, 2019
Fits perfectly in my surefire lights. Works great
By Jack
Central GA
An excellent choice
January 19, 2019
I use flashlights all day every day. I keep a Streamlight 2xCR123 on me and chose a model that couldn't take 18650s because they are significantly larger. This battery last longer than 2 CR123 rechargeables and has worked reliably every day for over a year.
By Rosewood
Great batteries and nice fit in tight flashlights
July 30, 2018
I have other ultrafire 17670 batteries. These seem a bit slimmer where the protection circuit is installed. This allows these batteries to fit easily in a Surefire G2 and Surefire 6P whereas the the older ones I have are either tight fit or unable to fit. I have a couple of other lights that I have never been able to get a full size lithium ion battery to fit and these fit quite well.

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UltraFire UF 17670 1800mAh 3.7V Protected Lithium Ion (Li-ion) Button Top Battery - Bulk

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