Table1) Specifications

1)Streamlight XR-1	2)Streamlight TR3	3)LED Lenser LL7459	4)Streamlight CR-2	5)TigerLight GOLD	6)Streamlight Ultra-Stinger	7)Streamlight DR-2	8)Ultra-Stinger Instruments 6V Rechargeable

Table 2)Ease of Use & Charging Details

Description
The Streamlight Ultra-Stinger is an alternative to the classic benchmark flashlight of a similar form factor. The Ultra-Stinger uses a unique switch cover and charging occurs through a connection via a charging cradle. As is customary with many such lights, a 12V DC cigarette charging adapter in included in the package. The Ultra-Stinger bears some similarity to the venerable 'Cop' light of it's same length but in many ways it is different. One advantage of owning a Ultra-Stinger is that it is substantially lighter in weight due to the fact that it uses a Sub-C type battery pack rather than a D type pack as so many other do. This makes the Ultra-Stinger an ideal option in circumstances that call for a lighter weight flashlight. The lighter weight Ultra-Stinger reduces the burden of the male as well as female operator. In addition, the narrower diameter handle makes it easier for smaller handed individuals to manipulate the flashlight. Of all the lights of this type that we tested, the Ultra-Stinger delivered a beam further than the rest.
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Sales Source:http://www.brightguy.com
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Specifications for:

• Dimensions:L= , Head Dia= , Body Dia =
• Net weight: gms / oz
• Colors: Black Hard Anodized II
• Composition: High strength aluminum, Acrylic + other
• Bulb type: Streamlight 10W Halogen PR base
• Average Bulb Life Expectancy:
• Battery Type: 6V NiCad
• Top-Off Charge Time:
• A/C, Current requirements:
• DC, Current Requirements:
• Run-time (duration) to 50% of Maximum Brightness
• Accessories Included: Charging Cradle + A/C (USA or Country Specific) & D/C 12V Cigarette Plug, Instructions
• Optional Accessories: spare batteries & bulbs

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Evaluation Results & Summaries

Ease of Use
Very Good. The user simply locates and depresses the click On/Off switch button to turn the light On and Off. A partial pressing allows for momentary On activation. Rotating the helical screw head allows for adjustment of beam angle from a spot to a wide-angled beam. Battery replacement simply entails unscrewing the tail piece in exactly the same manner as if one were replacing batteries on a traditional flashlight. Charging simply entails a firm push of the light's head into the dedicated cradle. An indicator light signals that charging is taking place. Because the tail-piece is flat, the light may be stood upright for a ceiling bounce style of illumination indoors. In most cases, the light may be stowed head down on a flat surface or it may be carried in dedicated belt accessories designed specifically for that purpose. The rather 'forward' situated and head mounted switch made acquisition a bit slower than the best in class light. In addition, there is potential for tactile confusion between the switch and the charging contact during situations of high duress.
4.5 points
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Task performance optimization
Excellent. The Ultra-Stinger provides a practical source of bright hand-held illumination for contexts that demand a combination type beam that is able to pinpoint a subject at distances from a couple of meters to nearly 325' as well as provide a broad disc of context revealing illumination that makes such lights a perennial favorite for navigation, search and tactical applications. Being of respectable length, heft and weight, the Ultra-Stinger also doubles as a nightstick or club for defensive or police applications. Because it's rechargeable, the astute user may always have a substantial amount of brightness and runtime at their disposal and at a moment's notice, Because batteries are charged while inside the lights, repetitive removal of batteries is unnecessary- eliminating a potential source for risk, wasted time and component loss. The Ultra-Stinger is the best value in terms of throw /Dollar for those customers that must have the furthest throwing Police type flashlight with the least amount of weight and heft.
5 points
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Documentation Quality
Unknown
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Battery Charging (Ease, Frequency, Maintenance)
Charging set-up and procedure are easy. Frequency of charging will depend on the user but since the manufacturer recommends charging after each use, the customer doesn't have to monitor re-charge cycles too closely. A caution is made to not over discharge the battery (running it down flat) and to remove the unit from the charging cradle if it hasn't been used in a month. Unlike flashlights that use NiCAd batteries, the Ultra-Stinger is furnished with a NiMH or Nickle Metal Hydride pack instead. This type of battery doesn't exhibit the 'memory' issues associated with NiCad batteries, however they do loose about 1 minute of runtime per day in storage. Since they are designed to be charged on a regular basis, this isn't a noticeable drawback. There are two contacts on the head of the Ultra-Stinger that mate to two contacts inside the cradle. The connection is positive but requires attentiveness.
4.5 points
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Balance, Grip-ability, Stow-ability, Tabletop Stand-ability
Good. The Ultra-Stinger performs in a practical manner to be immediately available to its user whether it's placed head up or tail up on a table, head up in a belt carrier or otherwise stowed in luggage. The shiny knurled grip surface provides satisfactory traction in most cases but may become slippery when wet or covered with oil. The light balances one inch fore of it's midpoint. As mentioned, it's a delight to hold since it accommodates small hands as well as heavily gloved hands. It simply doesn't have the heft of a D type flashlight making it burdenless to carry all day long. The wider headed Ultra-Stinger could complicate stowage somewhat and it's really too wide a head to stuff into one's pants pocket, but that may be easy to overlook if maximum throw is the key requirement.
5 points
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Items of Note:
The Ultra-Stinger's bulb design includes a dedicated base that interfaces with a seating in the bezel. This approach ensures that the bulb is perfectly centered inside the reflector. The result is that once centering is thus achieved, the bulb is positioned to deliver an optimized beam from the dedicated reflector. Many lights that use bi-pin base bulbs lack this self-centering feature, making them time-consuming to center by eye.
5 points