
 The All-Round Flashlight Expert
®
Intellicharger i2
User Manual
The Intellicharge i2 is a universal, automatic smart-charger compatible with 
almost all types of rechargeable batteries thus eliminating the need to own 
several chargers. The i2 is able to automatically identify Li-ion, Ni-MH and 
Ni-Cd rechargeable batteries and apply an appropriate charging mode 
(Constant Charge Current (CC), Constant Charge Voltage (CV) and Trickle 
Charge). Each of the i2’s two microcomputer-controlled charging slots is 
capable of monitoring and charging batteries independently. Additionally, 
yellow and blue power/charging status indicator lights could visibly indicate 
battery status and charging process. i2: The all-new highly advanced smart 
charger. It’s as simple as insert, detect, and charge.
Features 
·Capable of charging 2 batteries simultaneously
·Each of the two battery slots monitors and charges independently 
·Compatible with and identifies Li-ion (26650, 22650, 18650, 17670, 18490, 
17500, 18350, 16340(RCR123), 14500, 10440), Ni-MH and Ni-Cd (AA, 
AAA, AAAA, C) rechargeable batteries 
·Optimized charging design for IMR batteries 
·Features three charging modes (CC, CV and Trickle Charge)
·Automatically detects battery status and selects the appropriate voltage 
and charge mode
·3 Color LED displays charging progress for each battery
·Automatically stops charging when complete
·Features over-charge prevention to protect batteries
·Made from durable ABS (fire retardant / flame resistant)
·Features reverse polarity protection 
·Designed for optimal heat dissipation
·Certified by RoHS, CE, FCC, CEC and KC
·Insured worldwide by Ping An Insurance (Group) Company of China, Ltd.
Specifications
Input : AC 100-240V 50/60Hz 0.25A(MAX) or DC 12V 1A 
Output voltage: 4.2V ±1% / 1.48V ±1% 
Output current: 500mA × 2 
Dimensions: 131mm × 69mm × 36mm 
Weight: 116g (without batteries and power cord) 
Compatible with: 
Li-ion / IMR: 26650, 22650, 18650, 17670, 18490, 17500, 18350, 
16340(RCR123), 14500, 10440
Ni-MH / Ni-Cd: AA, AAA, AAAA, C 
Operating instructions
1. Plug one end of the power cord or car charger adapter to the charger’s 
power input. Plug the other end of the cord into a wall outlet or the cigarette 
lighter receptacle in your vehicle. All yellow power indicators will illuminate 
as the charger runs a quick self-test. The yellow power indicators will turn 
off automatically once testing has completed.
2. The i2 features two charging slots, with each slot able to charge batteries 
independently. Rechargeable batteries of differing chemistries and voltages 
may be charged simultaneously using 1 or 2 of the charging slots. 
 Note: The i2 is capable of charging 3.7v Li-ion rechargeable cells OR 1.2V, 
Ni-MH/Ni-Cd rechargeable batteries only. See above for description of 
battery sizes.
3. When inserting a battery ensure the positive and negative ends correspond 
with the positive (+) and negative (-) symbols on the charger. Incorrectly 
inserting the batteries will result in the reverse polarity circuit being 
activated causing the charge status lights to blink rapidly. Should this occur 
reposition the batteries to the correct polarity.
4. When one or two batteries are charged at the same time, each charging 
slot will receive a maximum output current of 0.5A. When the battery is 
inserted incorrectly or it’s not a rechargeable battery, three yellow power 
indicators will blink rapidly to remind user.
 Warning: Charging current higher than 0.5A might overheat 10440&15266 
Li-ion batteries. It is not recommended to charge these batteries with i2 in 
order to preserve battery longevity.
Battery Activation 
For every installed battery, the i2 will activate the battery by charging it for six 
seconds at a low current. If zero voltage is detected, all three yellow power 
indicators will blink quickly. If activation fails the first time, please remove and 
reinstall the battery once again and activate for the second time. 
Note: The i2 is not recommended for use with over-discharged (zero volt) 
UNPROTECTED Li-ion batteries. Li-ion batteries without a protection circuit 
can potentially cause a fire or explosion.
Overtime Prevention
The i2 is equipped with an advanced ‘overtime’ safety function. The i2 will 
individually monitor the elapsed charging time for each battery slot and if a 
particular slot exceeds 20 hours, the i2 will automatically power off the slot 
and three yellow power indicators will stop blinking and illuminate steadily to 
indicate completion of the charging process. This feature reduces the risk 
caused by batteries of lesser quality.
Precautions
1. When charging different battery types simultaneously (for example, li-ion 
26650 and AAA), always ensure solid contact is made between both 
sides of the battery and the charging slot’s metal contact points.
2. The i2 is restricted to charging Li-ion, IMR, Ni-MH and Ni-Cd 
rechargeable batteries only. Never use the i2 for other types of batteries 
as this could result in battery explosion, cracking or leaking, causing 
property damage and/or personal injury.
3. The i2 should only be used indoors or inside a motor vehicle. Do not 
expose it to water, high humidity, low or high ambient temperatures.
4. Do not disassemble or modify the charger.
5. Children under the age of 18 should be supervised by an adult when 
using the i2.
6. The i2’s safe operating temperature is between 0℃--40℃.
7. Do not use or store the charger near open flames, direct sunlight, heating 
devices or other high-temperature environments.
Warranty Service
All NITECORE® products enjoy a comprehensive after sale warranty service. 
A malfunctioning NITECORE® i2 charger may be exchanged for a 
replacement by a local authorized distributor/dealer within the first 15 days of 
receipt by the end user. After 15 days and up to 12 months, the i2 may be 
sent to an authorized distributor/dealer for repair. Beyond 12 months, the 
warranty covers labor costs and maintenance with the exclusion of 
accessories or replacement parts. 
The warranty is nullified in any of the following situations:
1. The product(s) is/are broken down, reconstructed and/or modified under 
unauthorized conditions.
2. The product(s) is/are damaged through improper use.
3. The product(s) is/are damaged by leakage of batteries.
For further details of Nitecore’s warranty service, please contact a regional 
distributor/dealer or send an email to service@nitecore.com
The Nitecore official website shall prevail in case of any product data 
changes. 
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TEL: +86-20-83862000 
FAX:  +86-20-83882723  
E-mail:  info@nitecore.com  
Web: www.nitecore.com 
Address: Rm1401, Glorious Tower, 850 East Dongfeng Road, 
Guangzhou, China 510600
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