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

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100+$6.70 ea.
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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
8 Reviews
75% (6)
13% (1)
0% (0)
13% (1)
0% (0)
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.

By Lance
Okay battery
October 4, 2017
I bought this battery to run in my elzetta flashlight. I use my elzetta flashlight around the house alot and got tired of going through cr123 batteries. A 18650 won't fit so I bought this one. The charge holds okay and is okay for use around the house.
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UltraFire UF 17670 1800mAh 3.7V Protected Lithium Ion (Li-ion) Button Top Battery - Bulk

  • $7.75
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  • In Stock