After-Sale Service

Q1: Where can I get after-sales service?

A1: You can get the after-sales service according to the warranty card, receipt or invoice, etc., please visit the warranty process page for more details. 

Q2: How can I tell if the product is authentic?

A2: You can enter the security code of the product on the anti-counterfeiting query page.

Q3: How do I purchase spare parts for my product?

A3: You can contact the place of purchase or contact us directly.

Purchase Process

Q1: When will the order be delivered?

A1: After purchase, it can usually be delivered to your hands in 3-5 days.

Q2: Are all XTAR products subject to quality inspection?

A2: In order to ensure that customers receive premium products, all XTAR products undergo rigorous quality testing before shipment.

Q3: Where can I buy XTAR products?

A3: You can go directly to the XTAR official store or authorized store to buy.

About Batteries

Q1: What is the proper charging current and how to calculate the charging time of a lithium battery?

A1: The charging current we need to pay attention to is mainly the constant current charging. At this time, it is in the fast-charging phase. Most charging currents are set between 0.2C to 1C. If you want to calculate the charging time, divide the battery capacity by the charging current, and add 0.5 to 1 hour at the end. You can read more about the best charging current and charging time calculation for lithium-ion batteries.

Q2: What affects the lithium battery life and how to calculate it?

A2: Battery life is influenced by multiple factors, such as battery capacity, device power consumption, and working temperature. The battery life is the battery energy dividing the device’s power consumption. we should not hastily judge the quality of a battery solely based on its shorter usage time in certain devices. Read more about the factors affecting lithium battery life and device runtime calculation.

Q3: What’s the difference between battery ratings of mAh vs. mWh?

A3: mAh (Milliampere-hour) is a unit of measurement for battery capacity. mWh (Milliwatt-hour) is a measure of the total energy stored in a battery. Battery energy = battery capacity x voltage. For devices with low power requirements, such as TV remote controls and wall clocks, mAh is the preferred unit of measurement. While for medium or high-drain devices, such as VR controllers, and wireless microphones, mWh becomes the ideal unit of measurement. Read more to understand the battery ratings of mAh and mWh better.

Q4: What does internal resistance tell us about battery health and how to measure it?

A4: A quality 18650 high-drain battery typically has an internal resistance of around 12mΩ, The internal resistance of high-quality protected lithium-ion batteries is below 70 mΩ. A healthy 16340 protected battery should have an internal resistance of around 120mΩ. A healthy Ni-MH battery usually has an internal resistance of less than 50mΩ. Read more to learn about how to measure the internal resistance and judge the battery health.

Q5: Can different lithium-ion batteries be mixed in one device?

A5: It is okay to temporarily mix batteries in an emergency, but it is not recommended to make this a habit. Despite batteries being small in size, they involve complex chemical reactions and structures. There is an article that explained clearly about whether you can mix different lithium-ion batteries in one device.

Read more guides about cylindrical batteries.

About Charging 

Q1: Can the XTAR charger be recharged with a solar panel?

A1: If the output voltage of the solar panel matches the input voltage of XTAR, it can be charged.

Q2: Can the over-discharged battery be activated and continue to be used?

A2: For most over-discharged batteries, it can be activated by the Activation function of the XTAR chargers. If the battery is completely damaged, it cannot be repaired and it is not recommended to continue using it.

Q3: Why do XTAR chargers take 10 minutes to activate and identify battery types?

A3: Usually chargers identify the battery types based on their voltage. Because the voltage of the nickel-metal hydride battery overlapped with the voltage of the lithium-ion battery that was seriously over-discharged. Most high-capacity lithium-ion batteries need 5 to 10 minutes to be activated. Several old models would take even more than 10 minutes. So, to enhance the identifying accuracy of the charger, the set of 10 minutes would be better. It also avoids the risk of identifying a seriously over-discharged li-ion battery as a NiMH type.

And it doesn’t delay the charging of NiMH batteries. The chargers use a very small charging current to charge the batteries to detect the voltage. So during the recovering and identifying process, the battery is also charging.

Q4: Does fast charging damage battery life?

A4: Fast charging will not damage your 18650 li-ion battery if you use a good smart charger. The premise is, please make sure to buy a top brand high-quality charger instead of no name one. Because those cheap low-quality chargers do not take any protection measures during the battery charging. Read this article to find more details about whether fast charging damage battery life.

Q5: Why your NiMH batteries be detected as Li-ion while charging?

A5: There are usually two reasons for this issue. One is the charger may be broken, and the other is the battery is too old. This article explained clearly why your NiMH batteries are detected as Li-ion and how to deal with it.

Q6: What is the best way to store 18650 li-ion batteries if not used for a long time?

A6: If you use a VC8 charger, adjust your batteries to the best storage voltage (usually around 3.6V for Li-ion batteries) with its storage function. Then, recharge your batteries every three months.

Read more guides about battery charging

About Flashlights

Q1: Are all XTAR flashlights waterproof?

A1: Yes, all XTAR flashlights are waterproof. For more details, please visit the product page of the flashlight.

Q2: Why does the flashlight get hot after a long time of use?

A2: Flashlights generate heat due to high power in high lumens. We use aluminum PCB boards to dissipate heat to the outside world so that the inside of the flashlight does not overheat and the overall temperature is not too high.

Q3: What batteries should I use in my flashlights?

A3: We suggest you use brand high-quality protected batteries so that you can experience better performance and safe use.

Read more guides about dive lights and EDC flashlights.


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