01.    High-performance rechargeable lithium-ion battery (Li-ion), size 18650, capacity 4000mAh.
– 4000mAh capacity
– IPX6 water resistant
– Internal safety features
– Mercury Free, Lead Free.
* It is the intellectual property of NITECORE. All rights to take legal action are reserved.

02.    The first 18650 size rechargeable Li-Ion battery with a capacity of 4000mAh
Its design and manufacture is the result of NITECORE's collaboration with an industrial partner.
It has an energy density of 288mWh/g and a huge capacity of 4000mAh (14.4Wh) which is 17.6% larger than common
18650 batteries.
– One NL1840 battery equals Four (4) CR123A disposable batteries
* Data measured in NITECORE lab, comparing 18650/3400mAh battery and market CR123A (1200mAh 3V) batteries.

03.    Internal safety features
– Built-in positive pole protection circuit protects against overcharge, overdischarge
and short circuit.
– Pressure relief valve that is activated in the event of a rapid increase in temperature.

05.    High performance purpose built electronic protection circuit.
– Effectively protects against over-charging, over-discharging and short-circuiting.
– Incorporates high quality electronic protection circuit for batteries
– Incorporates a high power MOS-FEE for the current regulation unit for better efficiency and
excellent performance.

05.    External safety features
– It is provided on both its poles with stainless steel protectors ensuring strong impact resistance,
good electrical conductivity and resistance to oxidation.
– Housing made of durable metal film protects against abrasion.

6.   Water resistance according to IPX6.
Not afraid of water and splashes.

7.    Mercury Free, Lead Free, Cadmium Free
For safe use and storage.

8.    Low Cost and Environmental Friendly
An NL1840 battery retains more than 80% of its original capacity after 500 full charge cycles.

9.    Safe and Reliable
Globally insured and approved with multiple global certificates

11.    Features
– Capacity: 4000mAh 3.6V (14.4Wh)
– Diameter : 18.6mm ±0.3mm
– Length: 69.8mm ±0.3mm
– Weight: 50g
– Warranty period: 12 months warranty from the day of sale

11.    NITECORE
UMS4, UMS2, Ci4, Ci2