Flashlight Reviews

NiteCore Defender Infinity - Silver

provided for review by
NiteCore Defender Infinity Silver is Silver Nickel plated special limited edition flashlight from EDGE Tactical Light Co. Ltd. Like the original NDI, the Infinity Silver is based on single AA sized battery. NDI Silver belongs to Infinity Defender series of flashlights from EDGETac (EDGE Tactical Light Co. Ltd.). NDI Silver is specially designed for self defense and for use as a general flashlight. The NiteCore Defender Infinity Silver has two light operating levels both of which are are configurable through light programming. Both the light levels are memorized by the electronic circuitry. LED used in NiteCore Defender Infinity Silver is high efficiency Cree 7090 XR-E Premium Q5 binned WC tint LED. Reflector of NiteCore Defender Infinity Silver is built from solid Aluminium with Light Orange Peel (LOP) reflector finish. The Glass lens in front is anti-reflective impact resistant lens with Dual-Coating (TM). Dual-Coating is the specialty diamond coating on outer surface of the lens over the AR coating. The NDI Silver uses digitally regulated electronic drive circuit along with Microcontroller (µC) based programming unit. Brightness levels are controlled by turning the head. The body of NiteCore Defender Infinity Silver is built of military grade Aluminium alloy. Light is plated inside out with Mirror finish Silver Nickel Plating. The Nickel Plating makes NDI look like it's built of silver hence the name NDI Silver. Interestingly, there are no laser engravings anywhere over the entire outer body of the flashlight. The tactical forward type click switch located at the tail cap end has black color rubber boot. The advantage of tactical switch is it allows momentary operation. Battery contact spring at the tail cap switch end is gold plated ensuring very good connectivity with the battery. The positive contact on head is gold color plated direct PCB contact. There are O-Ring seals at various places for waterproofing, NiteCore Defender Infinity Silver meets IPX-8 Waterproof Standard. The Overall build quality of NiteCore Defender Infinity Silver is superb. NDI Silver meets US MIL - STD - 810 F standard resistance to impact by dropping. NiteCore Defender Infinity Silver comes in nice cardboard box packaging along with accessories. A special 550 para cord based lanyard is also included.

Light Features:
  • US MIL - STD - 810 F standard resistance to impact by dropping
  • Meets the IPX - 8 standard waterproof specifications
  • Special Silver Nickel plated finish
  • Dual-Coating based AR coated glass lens
  • Solid Aluminium LOP reflector
  • Cree 7090 XR-E Premium Q5 binned WC tint LED
  • Digitally controlled, regulated drive circuit
  • Two light levels, both of which can be configured and memorized
  • Can safely operate range of AA sized batteries, ranging from standard AA Alkaline, NiMH rechargeable and Li-ion AA (14500) rechargeable battery
  • Forward type, tactical click switch with momentary operation
Light Operation & Output:
Light Operation: The switch installed on NDI Silver is tactical click switch with momentary mode. For Switching ON / OFF use tail cap click switch. Click once to switch on, click again to switch off. For momentary operation soft press the switch.

High Mode: is achieved by fully tightening the head. In default factory setting, the light output is maximum in this mode. Typically 190 Lumens on Li-ion AA (14500) rechargeable battery and 180 Lumens on Lithium AA batteries as per the manufacturer specifications.
Low Mode: Loosen the head for low mode for low light output. Low mode light output is typically less than 5 Lumens.

Below is the chart showing total output levels for various AA sized batteries.

NiteCore DI Silver
Level Sanyo Eneloop
Alkaline AA AW 14500
High 1070 1100 1598
Low 24 24 33

Light Info:
General Info
    Light Model Defender Infinity Silver
    Manufacturer NiteCore
    Review Page & Image
 Defender Infinity Silver
Defender Infinity Silver
    Country  China
    Review Date 2008-06-26
    Review Update 2008-06-26
Light Vitals
    Length 97 mm
    Width / Bezel Diameter 20 mm
    Width / Tube Diameter 18 mm
    Height (if applicable)  mm
    Weight (without battery) 64 gm
Light Source
    LED Format Power LED
    Number of LEDs 1
    LED Name Cree XR - E
    LED Power 3  Watts
Light Management
    Lens Material Clear Glass
    Lens Coating (if any) Diamond Double AR Coated
    Lens Transperency (typical) 93
    Lumen Management Reflector
    Material Aluminium Metal LOP
    Beam Type Mostly Throw with good side spill
Power Management
    Converter Type Buck Boost
    Properties Regulated, Advanced Micro Controller (uC)
    Features Advanced User Interface
Batteries Supported, Output & Runtime
    Battery Size
    Nominal Voltage
    # Used
    Total Output
    Runtime to 75%
    Runtime to 50%
    Runtime to 25%
NiMH  Alk  Li-Ion
Switch Options
    Switch Type
    Switch Properties
Forward Click
Body Material Options
Special Nickel Silver Plating
Light Rating
90 90
    Build Quality
75 75
60 60
80 80
75 75
90 90
    Bang for buck
70 70
    Overall Rating
In-Depth Review & Pictures:
Packaging: NiteCore Defender Infinity Silver comes packaged in nice card board box. In the box, the light is sandwiched in between two foam beds placed over lint free polishing cloth. Also included are operating manual, accessories which are placed at the bottom of the box.

Inside the box you will find NiteCore Defender Infinity Silver relaxing nicely on the white colored lint free polishing cloth just beside the 550 para cord lanyard.

Contents and accessories include warranty card with bar code, operators manual for NiteCore Defender Infinity Silver, Two additional O-Rings, one tail cap switch boot, two additional tail cap switches and 550 para cord based lanyard.

550 Paracord based Lanyard: Paracord is basically a parachute cord made from nylon kernmantle rope that is originally used for parachute suspension lines. The para cord is well known for its elasticity and tensile strength. Nominal breaking strength is typically of the order of 550 pounds. Thus the name 550 para cord. The lanyard is braided using this cord making it exceptionally strong. There is a glow in the dark (GTID) attachment at the end of the lanyard making it easy to find in the dark. Also shown in picture below are the two extra switches, translucent O-Rings and the black colored tail cap boot.

Size Comparison: Pictured below From L to R: Alkaline AA battery and NiteCore Defender Infinity Silver. The NDI Silver is about twice the length of AA Battery. More specifically NDI Silver dimensions are 95 mm in length and 19 mm in diameter.

Bezel: Since the NDI Silver falls under tactical category which typically features crenellated bezel. The NiteCore Defender Infinity Silver bezel has three sharp crenellations. When the light is kept bezel down, crenellations are helpful in determining the state of flashlight. If the flashlight is switched on in bezel down position over a flat surface, the light escaping out of crenellations will notify and alert user thus preventing rundown of battery. This is not the case for flat bezel where there is a danger of getting battery fully discharged if accidentally switched on bezel down.

LED & Reflector: Let's have a closer look at the reflector and LED of NiteCore Defender Infinity Silver. The reflector in NDI Silver built from solid Aluminium. The reflector has Light Orange Peel (LOP) finish and its diameter is about 17mm. The beam pattern is very good hotspot with equally good side spill. Beam pattern for NDI Silver is mostly throw with good side spill free from rings and any artifacts. The premium binned Cree XR-E LED is aligned perfectly in center.

Body: NiteCore Defender Infinity Silver is built from military grade Aluminium. Body is plated inside out with Silver Nickel plating. The metallic silver color with golden tinge combined with bands of diamond knurling gives NDI Silver aesthetically pleasing looks. The built quality of NiteCore Defender Infinity Silver is excellent.

The whole body, from head to tail cap of NiteCore Defender Infinity Silver is covered with bands of diamond knurling. in addition, the battery tube has grooves machined that provide additional grip.

One of the most important things is that there are no laser engravings on any where outside the body. This is distinctively different from the original NDI. As you can see in the picture below the flat surface is simply blank. Some of the users didn't feel particularly good about extensive laser engraving on the original NDI.

Tail cap has means of attaching lanyard. Overall the construction of NiteCore Defender Infinity Silver is fairly strong.

Components: NiteCore Defender Infinity Silver consists of three main components; head, battery tube and tail cap. Head houses LED, reflector and electronics where as the battery tube accommodates AA sized battery. The tail cap is installed with forward type tactical click switch. Tail cap has tactical switch with black rubber boot.

Head: Here is a more detailed look at head of NiteCore Defender Infinity Silver. There is a band of diamond shaped knurling on the head that extends to the bezel end. The knurling offers good grip required for twisting the bezel to change light levels.

Here is a multi angle view of NDI Silver head. The positive contact is integrated over the PCB and is gold color plated. Surrounding the positive contact, marking "Light Engine Ei Infinity" denote the electronics inside is capable of running the flashlight with input voltage ranging from 0.7 Volts to 4.2 Volts. This range is sufficient to accept all major types of AA sized batteries. Ranging from Rechargeable NiMH, Alkaline, Primary Lithium and Rechargeable Li-ion batteries.

Battery Tube: Threads on battery tube of NiteCore Defender Infinity Silver are machined to perfection. NDI Silver is shipped with nicely lubricated threads. There is a translucent O-Ring sitting behind the threads on each end of battery tube. The battery tube has enough inner diameter so that there is no battery rattle. There is enough space for free battery movement. The battery tube can easily accommodate the AW RCR 14500 Li-ion batteries.

The battery tube of NiteCore Defender Infinity Silver on the bezel end has a oversized 'ring'. The 'ring' has two flat machined surfaces having 'X' marked over it. The purpose? It gives a distinct look and aesthetic feel. The flat surfaces prevent roll over of flashlight if kept on a flat slanting surface.

Thick walls of battery tube indicate a fairly strong construction of NiteCore Defender Infinity Silver flashlight.

Each and every detail of NDI Silver has been worked out pretty nicely. For instance the chamfering of edges on battery tube at the tail cap end helps in installing back the tail cap. The chamfering serves as a easy guide to tail cap.

Tail cap: The negative contact spring on the tail cap is gold plated. Gold plating on the spring ensures excellent connectivity with the negative terminal of battery. Switch installed on tail cap is forward type tactical click switch. It allows momentary switch on operation. The inner side of the tail cap is the only place where you will find laser engraving. The serial number of light out of 1000 limited is engraved on the switch retaining ring. a band of diamond knurling is machined on tail cap of NiteCore Defender Infinity Silver. There is also a provision of attaching lanyard.

Beam Shots:
Here is the Beam shot Matrix comparing NiteCore Defender Infinity Silver and NiteCore Defender Infinity Silver on Low & High light levels with single 14500 and CR123 and AW RCR123 battery respectively. All beam shots are taken at f/8 aperture with varying shutter speed.

Extreme Closeup Pictures: NiteCore Defender Infinity Silver
Here are a few extreme Closeup shots for NiteCore Defender Infinity Silver Flashlight. Built quality NiteCore Defender Infinity Silver is superb.

Bezel of NiteCore Defender Infinity Silver.

NiteCore Defender Infinity Silver head.

NiteCore Defender Infinity Silver battery tube.

Tail cap end of battery tube.

Tail cap.

Super Extreme Closeup NiteCore Defender Infinity Silver Bezel.

NiteCore Defender Infinity Silver Knurling.

NiteCore Defender Infinity Silver Body grooves and flat surface.

NiteCore Defender Infinity Silver Tail cap Knurling.

NiteCore Defender Infinity Silver Tail cap Knurling.
Equipment Used: Custom built Integrating Sphere with Gossen Mavolux 5032 Class B USB Light Meter as photometer. Mavolux 5032 B USB is high precision, high accuracy and high quality light meter with conformance to DIN 5032-7 and CIE 69 standards. Utmost care has taken to ensure that the light measurements are accurate. Click here to read more about Gossen Mavolux 5032 USB Light Meter.

Alkaline: The runtime for NiteCore Defender Infinity Silver with Alkaline battery on MAX light output is about 25 Minutes till 50%. What's fascinating is that the total output out front starts at 110 Lumens, one of the highest observed so far from a single AA cell based flashlight on Alkaline battery. Due to the nature of current required and Alkaline battery, NiteCore Defender Infinity Silver shows no signs of any regulation. Alkaline battery is simply not capable of supplying the high current demands. Runtime for NiteCore Defender Infinity Silver for lesser output levels will be considerably more.

Alkaline Retests: We performed more tests with the same Alkaline battery with a gap of 2 days between each test. The output of test 2 started and remained at around 40 Lumens for about 15 Minutes, then slowly degrading to 30 Lumens in next 15 Minutes and ultimately battery gave up in last 15 Minutes. Note that in all cases of Alkaline runtime, the flashlight enters in to 'moon mode' of about 1 to 2 Lumens. Output of test 3 also starts above 40 Lumens but then immediately drops. Total runtime in test 3 is about 20 Minutes before going to moon mode. Test 4 and 5 maintained output around 20 Lumens for about 10 to 15 Minutes. By the end of 5th test the Alkaline battery had almost completely depleted. Yet, NiteCore Defender Infinity was able to extract energy from it in form of 'moon mode'.

Sanyo Eneloop AA NiMH: The runtime for NiteCore Defender Infinity with fully charged 2100 mAh Sanyo Eneloop AA NiMH battery on MAX light output level is about 41 Minutes till 50%. The total light output out front stays between to 100 and 90 Lumens for first 30 Minutes and then starts reducing quickly with a sharp drop around 40 minutes. Light runs in regulation due to the flat constant discharge curve of Sanyo Eneloop battery.

Runtimes Conclusion: We recommend use of NiMH Batteries due to it's ability to maintain constant output and efficiency. Note that these runtimes were carried out at MAX output level. NiteCore Defender Infinity will run considerably more on low output levels. You can still use Alkaline batteries, in case of emergencies as backup battery. Here is the chart comparing NiMH and Alkaline batteries at MAX output level.

Buy NiteCore Defender Infinity Silver Flashlight at www.NiteCore.com
Jump To: Top - Light Operation - Light Info - In-Depth Review & Pictures - Beam Shots - Extreme Closeup Pictures - Runtime