Inova T4 (2011 Version) Review

Now in its fourth generation, the Inova T4 is an advanced lithium-ion powered flashlight that has gone through several updates and revisions, with the latest 2011 model (T4QM-HB, identifiable by a “D” in the serial number) introducing a new LED for increased brightness, as well as an additional 94-lumen medium mode. One of the smallest lights in the mid-sized rechargeable flashlight category, the T4 packs a lot of power and functionality for its size.

Key Specifications

  • Output: 227 lumens high, 94 lumens medium, 16 lumens low
  • Intensity: 10,000 candela
  • Runtime: 2h 15min high, 6h medium, 48h 30min low
  • Battery: 1 x Li-Ion Rechargeable Battery Pack
  • Length: 8″
  • Diameter: 1.4″ bezel, 1.1″ body
  • Weight with Batteries: 9.07 oz.
  • Warranty: 3 years
  • MSRP: $149.99
  • Actual Pricing: ~$110

Pricing & Ordering

MSRP for the Inova T4 is $149.99, and the light is only available in black. Many retailers sell the T4 for around $110.

In The Box

Included in the box are: Inova T4, Li-Ion rechargeable battery, charging cradle, 2 x mounting screws, AC adapter, cigarette lighter adapter, and user manual.

A nice touch here is that every component is neatly packaged in either a box or a bag, with a label indicating what is inside (not shown above).


A proprietary rechargeable 2150mAh lithium-ion battery powers the Inova T4.

To charge the light, insert the light into the charger and pull down on the light to ensure alignment of the grooves on the light and charger. All of the charging circuitry is contained inside the flashlight, which has an LED indicator for charge status. A solid red LED indicates charging, and solid green indicates a full charge.

A fully discharged battery can be recharged in about 3 hours, and leaving the light in the charger won’t overcharge the battery.

The Light

The head features an anti-reflective coated glass window and an aluminum reflector with a slightly textured “orange-peel” type surface. The uneven surface on the reflector removes artifacts from the beam, creating a wider, more uniform beam pattern.

The light is type-III anodized (hard anodize) aluminum. Hard anodize is the most durable aluminum finish, nearing the hardness of diamond. The switch is located mid-body below the charging LED, and gives good audible and tactile feedback with a solid click. The switch was changed in the fourth version of the Inova T4 to a stiffer, more durable one, and due to the small diameter of the body, it tends to be more difficult to activate with an index finger.

Both the head and body feature a checkered knurling pattern, making it easy to maintain a good grip regardless of which way the light is held.

Tail Cap
The tail cap of the Inova T4 does not serve any electrical purpose, as it only contains a rubber bumper that pushes the battery firmly in place.

An easy way to spot the latest revision of the T4 is by the newly-added Inova logo on the back of the tail cap.


One Click: High
A single click activates maximum brightness of 227 lumens, for a runtime of 2h 15m.

Two Clicks: Medium
When high mode is activated and the switch is clicked within two seconds, the 94 lumen medium mode is activated (note that if clicks are too fast, strobe will be activated). The T4 has a runtime of six hours on medium.

Three Clicks: Low
When medium mode is activated and within two seconds from activating high mode, the 16 lumen low mode will be activated if the switch is clicked once more. The light has a runtime of 48h 30m on low.

Click and Hold: Momentary On
When the switch is held for more than half a second, the light will turn off when the switch is released. A slightly annoying bug that we found with the momentary on mode is that the next time high mode is activated, the light will flash once.

Two Fast Clicks: Strobe
Two fast clicks at any time will activate the strobe.

For all modes, a single click will turn the light off if the two second time limit has passed. Since the light use an electronic switch, there is a small standby current drain of less than 7.5μA.


The Inova T4’s performance is in line with the average mid-sized rechargeable flashlight, with slightly more output and runtime than the competition due to the more efficient Cree XP-G LED.

The beam is smooth and contains a larger hotspot in the middle due to the orange peel reflector. The wide hotspot allows for more peripheral illumination, which is particularly useful for close-up work. The aluminum body of the flashlight acts as a heat sink, and can get moderately warm during extended use.

The T4 maintains steady output, even as battery charge is getting low, so the light features a low battery warning in the form of rapid flashing. We barely noticed this flashing because it was very rapid and only lasted for around 15 seconds, so it would be recommended to keep the batteries “topped-off” to prevent unexpected battery exhaustion during use.


If you haven’t read our article about runtime graphs and the ANSI FL1 Standard, please click here.


A charging cradle, AC adapter, and cigarette lighter adapter is included with the Inova T4.

An innovative accessory available for the T4 is the “Reserve Battery Holder and Extension.”

This add-on, which can be purchased for $39.99 and includes a spare battery, replaces the tail cap on the T4 with a battery tube extension that houses a spare battery. The extension adds about 4″ to the T4’s length.

Additional charging cradles, AC or DC adapters, batteries, and traffic wands are also available for the T4.


Small size and good performance characterize the Inova T4 rechargeable flashlight, and the T4 has a smooth beam pattern and a durable type III anodized finish. However, it’s the unique and practical optional spare battery holder that makes the Inova T4 stand out!

Pros Cons
  • High, medium, low, and strobe modes
  • Type-III anodized aluminum
  • Anti-reflective coated glass window
  • Energy-dense lithium-ion battery
  • Small and lightweight
  • Reserve Battery Holder (optional)
  • Stiff head switch
  • Short low battery warning

Related Links

Inova T4 Rechargeable LED Flashlight Product Page (Nite Ize)

Inova T4 Rechargeable LED Flashlight Product Page (Inova)

Rechargeable Flashlight Comparison on LED-Resource

30 Responses

  1. Ivor Biggen says:

    i had my t4 a few months now and like you guys ,it stopped charging so reading all these posts i took mine apart
    being a sparky i thought could fix and i did
    so this is what i did
    1/ i unscrewed the cap and removed the battery
    2/ then carefully remove the rubber cover around the switch with a small flat bladed screw driver
    3/ then i undid the two torx screws and removed the peice of plastic
    4/ then using a small bit of wire i pushed the switch assy out of the end of the torch
    5/ after carefully opening the clear tube like circuit board cover i pushed the brass tags were
    the screws go thro down so they were flat again ,
    Thus makin a better contact !!
    6/ after that its just a question of putting it back together again
    and mine is still charging as i write this


    Hi, I have recently acquired an Inova T4 charger, model no 553-0074 ( which has only a cable approx 11 inches long ending with a SAE connector) and flashlight AN 3096 which does have a lithium battery inside, what I’ d like to know is are they both compatible & if so how do I obtain the missing cable to operate the unit? Would be grateful for any advice/info!


    Flashlight model is AB3096 sorry!

  4. Robin Wang says:


    You may have to check with Nite Ize to see if they still have any of the old AC adapters with the SAE connector.

    Otherwise, getting a new USB charging cradle may be the best option:



    Flashlight model is AB3096 sorry!
    Thank you for replying, I’m waiting on a response from Nite Ize, will update if any results.

  6. SErgio Duran says:

    I have an old model AA5374 flashlight I have a problem with the charger the charger does not work

  7. Mohamed says:

    Hi i need battery 3.6 v 2150 amb
    Do seend to middel east
    Inform by e maim

  8. Mohamed says:

    Hi, I need a battery 3.6 v 2150am. Do you send it to me the list

  9. Jim says:

    Hi, I am after an INOVA lithium ion battery, please contact me

  10. Stuart says:

    My Inova is the T4R DB10279.
    The battery recently died.
    How and where can I purchase a new battery?
    All help appreciated

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