The working principle of a flashlight is simple. It’s the process of converting electrical energy into visible light. Let’s explain in detail:

Functional Patterns. All Stage Series beam pattern options were designed with optical simulation modeling, to shape the output in a highly-functional beam pattern. No matter what your auxiliary lighting needs are, there is a Stage Series optic for you!

The Wide pattern provides an extremely wide field of view, without wasting any light in the sky above and provides a 100Wx8H degree spread of light. It was designed to supplement your fog lights and is perfect for driving in inclement weather.

Choosing the right flashlight battery not only boosts performance but also ensures safety. Consider factors like power requirements of flashlights, capacity, discharge current, and safety when selecting batteries.

Bestlithium flashlight batteries

The Driving pattern was designed to supplement your high beams. Rather than a simple "spot" pattern, the Stage Series Driving pattern has a rectangular 20Wx8H degree pattern that is far more useful for directing light downrange at high speeds.

– Tactical Flashlights: These types are made for military or police use. They usually boast a compact size and emit strong light. 18650 or 21700 batteries are widely used to offer higher brightness and longer runtime.

There is also a general rule that single emitter rarely needs continuous discharge current of more than 10A. Multi emitter gets into 15A. If you are buying a beast, then 20A and up is appropriate. This is a general reference range. Specific battery requirement would depend on the design and specifications of the flashlight.

Torch battery 6V

XTAR, established in 2006, is a leading provider of high-quality lithium-ion batteries, smart chargers, and LED flashlights. Based in Shenzhen, we integrate R&D, production, and sales to deliver innovative power solutions. With over 18 years of expertise, XTAR is your trusted partner for reliable energy products, offering customized solutions for OEM and wholesale clients.

Usually, it’s easy to find flashlight reviews on YouTube, forums or other blogs. Some flashlight enthusiasts tested each lighting level of the flashlights and the discharging current. You just need to find the actual discharge current at the turbo mode. Then buying a flashlight battery with higher amps than that value.

Subscribe * indicates required Email Address * /* real people should not fill this in and expect good things - do not remove this or risk form bot signups */

Flashlights come in various shapes and sizes, but one thing they all have in common is the need for power. Let’s explore the different types of batteries that keep our trusty torches shining bright:

Lithium flashlight batteries12v

As batteries age or unused for extended periods, their internal resistance gradually increases. This is shown by reduced power output and shorter runtime. If you install this battery into the flashlight and turn on the high lighting mode, the flashlight will be in dimmer light.

Answer: Using a battery with a discharge current lower than the flashlight’s requirement may result in inadequate power supply, causing the flashlight to operate at reduced performance or even malfunction. It may lead to dimmer light output, shorter runtime, or overheating of the battery due to excessive strain. It’s essential to use a battery that meets or exceeds the flashlight’s current requirements to ensure optimal performance and safety.

Note that, batteries with protection circuit boards are 2-5mm longer than unprotected batteries, which would not fit some flashlights or chargers.

Answer: Lithium batteries themselves won’t make the flashlight brighter, but they provide stable current allowing LED flashlights to perform better in terms of brightness.

This type is considered to be the best replacement of traditional disposable Alkaline batteries. They offer higher energy density and current. Most importantly, they are rechargeable. So they are ideal for daily use and environmentally conscious users. They are primarily suitable for some small handheld flashlights.

In addition to discharge current, some battery specifications also mark the discharge rating(C-rating), such as 5C and 10C.

The CR123A batteries has the same size with the AA or 14500. It is non-rechargeable lithium battery type. With higher capacity and voltage, it is also another ideal replacement for the traditional disposable AA Alkaline batteries.

Quality matters too. Choosing batteries from reputable brands for stable performance and longer lifespan. Don’t skimp on cheaper options, as high-quality batteries ensure your flashlight operates correctly.

Proven Reliability. Stage Series lighting has been tested for long-term operation from -40 to 185 degrees F, vibration, moisture intrusion, and corrosion. All of these tests are completed to SAE/DOT standards, just like factory components. They've also been put to the test on-road, and are in-use by dozens of rally and endurance racing teams for nighttime stages and laps.

Dolphin torch battery

Experience. After over a decade in business, Diode Dynamics is one of the most trusted names in automotive LED lighting. We directly assemble and engineer our own products in the United States, allowing for higher quality and performance, with the newest and brightest LED technology. No matter what you're driving, we pride ourselves in offering only the best possible LED solutions. Please contact us if you'd like to discuss your lighting project!

XTAR, as a reputable brand in rechargeable lithium-ion batteries, chargers and flashlights, developed various high-quality flashlight batteries in different sizes and capacities. Here is a parameter comparison table:

– Search and Rescue Flashlights: Built for brightness and endurance, these flashlights use multiple 18650, 26650, or 32650 high capacity batteries.

Compact. The lightbar is based on a narrow-profile extruded housing, to allow fitment in small and tight areas. At less than 42mm tall, they'll fit in many places a traditional dual-row light bar won't, while cutting total weight as well. The heatsink design also drastically reduces wind noise, and does not whistle in the wind like many generic housings.

Lithium flashlight batteriesprice

– Super Bright Flashlights: Providing more than 10,000 lumens at great distances but for a short duration. These flashlights require multiple unprotected 18650 or 21700 batteries or high capacity battery packs. They attract enthusiasts interested in extreme brightness and technological innovation.

Generally speaking, the typical power efficiency of LED flashlights is between 100 to 175 lumens per watt. Let’s assume the flashlight’s maximum brightness is 1000 lumens. If loss is not considered, according to the formula:

The Flood pattern was designed to provide uniform, even illumination and a full 80Wx50H degree spread of light. Unlike generic "flood" light optics that are simply a heavily diffused spot, our flood optic is a true optically designed spread, resulting in the biggest spread in the industry! It is perfect for lighting up anything at low speeds, a backup or reverse light, or to light up a worksite.

Lithium flashlight batteriesfor sale

Simple connections. All Stage Series LED lighting products use a standard DT type Deutsch-style connector, and come with a 6-inch pigtail, with bare leads. You can wire yourself, use an off-the-shelf Deutsch wire harness, or select an optional Diode Dynamics wire harness.

Usually, the actual capacity is lower than the rated capacity, because the battery rated capacity is measured in lab conditions.

Introducing STAGE SERIES LED lighting! Inspired by the needs of a professional rally driver, these light bars have been designed for maximum functionality, with compact size, custom-engineered TIR optics, and a useful beam pattern, all in a highly durable package.

Battery capacity determines how long the battery can power a flashlight. Among the same lithium-ion battery sizes, a higher capacity means a longer battery life. The highest capacity for 18650 battery currently can reach 3600mAh to 4000mAh. Claims of capacities higher than that are often overstated. For 21700 batteries, the highest capacity can reach 5000mAh, and for 26650 batteries, it currently stands at 6000mAh. Higher capacity means higher battery price, so, finding a balance of battery capacity and price is important. Consider the actual usage needs and frequency when investing in a flashlight battery.

Some flashlights come with protection circuits, while DIY flashlights and some low-quality models usually don’t. When using an unprotected battery in a flashlight without protection circuit, there would be a risk of battery over-discharging and battery lifespan damage. Since most users can’t tell whether their flashlights have battery protection or not, it’s safer to choose protected batteries for EDC flashlights.

• Handheld EDC Flashlights: It is the most common types. EDC flashlights prioritize portability and functionality, accommodating various battery sizes from AA to 18650. Opting for a size readily available in stores adds convenience.

White or Amber. All Stage Series light bars are available in a cool white or amber color. The white is a 6000K color temperature, which is a true white output, without any blue. The amber is a brilliant deep yellow color, perfect for hazards or high contrast in poor weather. The SS12 Stage Series 12" White Light Bar can be found here.

Some manufacturers indicate the LED model on their flashlight specification, datasheet or user manual. For example, you find a flashlight uses CREE XM-L2 LED, then go to visit the CREE official website and read the datasheet of this XM-L2 LED. You will find the required maximum continuous discharge current there.

For AA and AAA batteries, due to their relatively low power, there is no need to pay attention to the maximum continuous discharge current and C-rating. These batteries typically meet the needs of most AA and AAA flashlights.

The discharge current and C-rate of lithium batteries are crucial factors in determining whether the battery suits your flashlight. Check if the discharge performance meets your needs before considering capacity.

As we all know, brightness and battery life are the two most important aspects of LED flashlights. They directly impact user experience. Then, what affects the brightness and battery life? The battery performance. So, be sure to consider the battery characteristics when investing in flashlight batteries.

When purchasing cylindrical batteries, check if they’re flat-top or button-top. Button-top batteries have a protruding positive terminal. You can enquiry the flashlight manufacturer or unscrew the flashlight to check which battery type it needs. If the flashlight’s positive terminal has a spring, it is capable of both flat-top and button-top batteries. But some compact flashlights may only support flat-top batteries. Without a spring on the positive terminal, flat-top batteries can’t contact the terminal very well. In this case, the flashlight needs button-top batteries.

Answer: Yes, lithium batteries are often considered the best power source for LED flashlights as they provide stable current and long-lasting power.

Using a battery with a discharge current higher than the flashlight’s requirement is generally safe. The flashlight will draw only the current it needs from the battery, and the extra capacity of the battery won’t be utilized fully. However, it’s essential to ensure that other specifications of the battery, such as voltage and capacity, are compatible with the flashlight to avoid any potential issues.

Different flashlight models often require different battery sizes. Usually, you can find the information on manufacturers’ websites or user manuals. Don’t use batteries other than those indicated for the flashlight.

Lithium flashlight batteriesaustralia

Discharge current comes in continuous and peak forms. Continuous discharge means the battery can sustain that current for an extended period under standard conditions, while peak current is the occasional, momentary current the battery can handle. It is not suitable for continuous discharge at peak current levels. Here are four ways to decide what discharge current you need.

• Headlamps: These head-mounted lights typically support AA, AAA, or 18650 batteries, providing convenient lighting for outdoor activities like cave exploration, hiking, camping, and different work conditions.

Disposable Alkaline Batteries are widely used due to their convenience and affordability. These dry AA and AAA batteries are available in almost every local store. And they have a long shift life. So they are the best choice for short-term use or emergency preparedness. However, compared to rechargeable batteries, they have lower energy density and are not environmental-friendly.

Focused. The compact size doesn't mean they're short on power! Thanks to the high-intensity Lumileds LED chips, coupled with our U.S. PATENT PENDING total internal reflection (TIR) optic, the total intensity of the Stage Series is far higher than a standard, generic light bar using basic optics or reflectors. Standard optics lose light internally, and to glare, spreading a little bit of light in every direction. Instead, the TIR optic in the Stage Series collects all of the light from the LED, and directs it only where you need it, drastically reducing glare and improving total efficiency. Click here to learn more: Total Internal Reflection (TIR) Optics | Stage Series Video.

Batteries play an integral role in flashlights. They not only power the flashlight but also directly affect its performance and safety. Choosing the right flashlight battery is essential. Here, you will find the comprehensive guide of how to choose a flashlight battery.

Internal resistance is crucial for lithium batteries, as it determines their overall performance. According to the formula that P=I²R, high internal resistance batteries struggle with high-current discharge, leading to sharp increase in battery temperature and power consumption. This affects their discharge performance.

For 18650 size, the quality high-drain batteries are usually below 14Ω, while the high-power batteries have much higher internal resistance. Due to the size limitation, a battery cannot get both high capacity and performance simultaneously. The battery discharge performance is more important.

Flashlights have different characteristics depending on their purpose: everyday carry, industrial, tactical, or outdoor activities. The most commonly used flashlights mainly fall into four categories:

torch battery - bunnings

• Outdoor Exploring Flashlights: For outdoor use, the runtime and brightness is important. So, it’s advisable to choose high-capacity rechargeable lithium-ion batteries to ensure sufficient power.

Change it up. Each lightbar is based on 6-inch segments. Each segment is sealed with an individual lens and a double-wall seal. This makes them more weather tight than a large, single seal, and it also allows you to change up the outer lens to suit your needs. With just a few screws, you can replace the outer lens with a new one to change the beam pattern or color. Replacement lenses can be found here.

But for the super bright flashlights which loved by flashlight enthusiasts, unprotected batteries would be the prefer choice. The reason is protected batteries have higher internal resistance and limited discharge current, while the flashlights usually require large current of more than 15 amps. For example, the Imalent MS18W flashlight has max output 100,000 lumens and uses 8 x Samsung 40T 21700 batteries.

Not just off road. In six-inch size, when installed as a pair and aimed in accordance with your state's regulations, the Wide pattern meets SAE J583 as a Foglamp, for legal on-road use. Please check your local laws and regulations for aiming, installation, and applicability.

2. Driver Circuit Board: The brain of the flashlight. It manages the flow of electricity, allowing you to switch between brightness levels and modes.

Answer: It’s good to do this. The best practice is to remove the batteries when the flashlight is not be used for an extended period of time This helps prevent battery self-discharge and extends the battery life. Store the batteries in a dry, well-ventilated place afterward.

In the world of flashlight batteries, rechargeable lithium-ion batteries reign supreme. They are commonly available in sizes like 18650 and 21700. Due to their high capacity and long battery life, these batteries are the go-to choice for most flashlight enthusiasts. Besides, they feature fast charging and a long recharge cycle life of 500 to 800 times. So, they are perfect for everyday carry and outdoor adventures.