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Nitecore NL166 RCR123A / 16340 650mAh 3.7V Protected Lithium Ion (Li-ion) Button Top Battery - Blister Pack

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  • High performance protection circuit prevents protection from overcharge and over discharge increasing the lifespan of your battery
  • Capable of 500 recharge cycles for a cost effective and environmentally friendly battery choice
  • The perfect battery for high drain devices like LED flashlights, video game consoles, and more
  • Nickel-plated S.S. protectors at both ends provide high impact resistance and oxidation resistance to protect the delicate circuits inside
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Nitecore NL166 RCR123A

Rechargeable CR123A Battery

The Nitecore N166 RCR123A Battery is a highly capable Lithium-Ion battery designed specifically for high performance electronics. These powerful RCR123A batteries deliver an impressive 3.7 Volts of power and can hold a charge of up to 650 mAh, making them perfect for high drain devices such as LED flashlights, video game consoles, cameras, appliances, and more. The cells come standard with a high-performance protection circuit that provides overcharge and over-discharge protection, safeguarding themselves from possible internal damage that could lower their capacity, ensuring they last as long as possible. The NL166 is capable of being recharged more than 500 times, making it both cost effective and environmentally friendly.

Safety First

Just as impressive as the NL166's power is its sophisticated safe design. The RCR123A batteries are equipped with a nickel-plated S.S. protectors at both ends to provide high impact resistance, good electrical conductivity and oxidation resistance. To prevent abrasions and other external damage, the NL166 cells are coated with a durable metallic film, while its circuit board is coated with an ultra tough plastic. The cell's innovative anode is designed to resist high temperatures, while a micro-porous barrier within the battery protects its delicate internal components. The battery even features a specialized pressure relief valve that activates if the battery experiences a rapid temperature increase.


  • Built-in high-performance protection circuit prevents overcharging / over-discharging
  • Nickel-plated S.S. connectors on both ends for superior impact resistance, electrical conductivity, and oxidation resistance
  • Durable metallic film coating protects against abrasions and other external damage
  • Pressure relief valve activates in the event of rapid temperature increase


  • Battery Size: RCR123A (16340)
  • Battery Chemistry: Lithium Ion (Li-Ion)
  • Voltage: 3.7V
  • Capacity: 650 mAh
  • Max Charging Current: 650mA
  • Recommended Charging Current: 300 mA
  • Max Discharge Current: 4A
  • Estimated Charge Cycles: 500 cycles
  • Diameter: 0.65" (16.6mm)
  • Height: 1.37" (34.8mm)
  • Weight: 0.62 oz (17.8g)
Battery Size:16340 / RCR123A
Battery Capacity (mAh):650
Battery Chemistry:Li-Ion
Battery Voltage:3.7
Battery Terminal Type:Button Top
Battery Shelf Life:3 Years
Packaging:Blister Pack
Warranty:Battery Junction 30-Day Warranty, Nitecore 1 Year Warranty
Return Policy:Battery Junction Return Policy
Product Weight:0.628oz
Product Dimensions:1.37" (L) x 0.654" (Diameter)
Country of Origin:CN
Associated Battery Sizes:17340, 2/3A, R123, RCR123, RCR123A
41 Reviews
73% (30)
17% (7)
5% (2)
0% (0)
5% (2)
By John
, N. California
Great Battery
June 8, 2016
I would have rated the batteries a 5 star if they were just a little shorter. I got 8 of them for my Arlo-Netgear Wi-Fi cameras. I found that they are just a little longer in length than the standard batteries. They are a very tight fit in the Arlo's. Each battery was packed in a blister pack upon my receiving them. I put them on my Nitecore charger for a full charge, let them rest, and installed them the next day. So far all is good with the Arlo's. I'll see if I can update this review at the time when the batteries need recharged.
Pros650mAh Protected
ConsSlightly longer than the stock commerical batteries, making for a very tight fit.
By Gary
Wichita Kansas
Great batteries
August 14, 2020
Only rechargeable batteries I buy as Nitecore products are the best both batteries and flashlights.
By john
Mesa, Arizona
Great battery
September 19, 2019
These really are awesome. I'm gradually transitioning to rechargables, but I still like to use these in a pinch. They last a very long time and I've never had one leak after using these for about 4 years.
By at25526
Nitecore NL166 RCR123A
July 9, 2019
Reliable rechargeable CR123 battery. Batteries are just a tad taller than primary 123s, but no problems in any of my lights.
By Tim R.
Worth the money
July 1, 2019
These batteries are great. Well worth the extra money in the long run.
1 Question & 1 Answer
from CT asked:
May 28, 2015
Does this cell have any protection built in?
1 Answer
The NL166 RCR123A battery automatically protects against overcharge, over discharge and short-circuiting.
Submitted by: Customer Service on May 28, 2015

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