We’re proud to support Hell Robotics, a Norwegian robotics organization dedicated to helping students explore science, technology, and engineering through hands-on learning.

During their recent Science Camp in Trondheim, 24 students from grades 6–10 built, programmed, and tested robots using XTAR rechargeable AA lithium batteries and chargers. With multiple robots running throughout the activities, reliable power was essential to keep the learning process moving.

By replacing disposable batteries with rechargeable solutions, Hell Robotics can reduce waste while maintaining stable performance for robotics education and workshops.

With nearly two decades of experience developing rechargeable battery solutions, XTAR is excited to support organizations that use technology to inspire curiosity and practical skills in the next generation.

Thank you to Hell Robotics for sharing this journey with us. We look forward to seeing what these young innovators create next.

Read more online: https://www.xtar.cc/news/xtar-powers-young-innovators-at-hell-robotics-science-camp-in-norway.html

As healthcare technology advances, the "hidden costs" of maintaining devices like battery replacements can quietly add up.

We recently analyzed a fascinating, real-world data set from a Navy Veteran that proves how a small change in battery strategy can yield massive long-term savings.Our veteran uses an Alpha-Stim M device to manage insomnia. By sending a specialized signal via ear clips, the Cranial Electrotherapy Stimulation (CES) quiets his rambling thoughts, helping him fall asleep in about 15 minutes.While the device is a lifesaver, its power requirements can get expensive.

The Cost Dilemma: Disposable vs. Rechargeable
The device manual highly recommends Energizer Ultimate Lithium AA batteries.
 The Cost: ~$30.50 plus tax for an 8-pack.
 The Performance: A pair lasts for 59 hours (59 one-hour nightly sessions).
 The Catch: Over years of nightly use, continuously buying these disposables creates a heavy financial drain.

To beat the high cost, he switched to XTAR 1.5V AA 4150 Lithium-ion rechargeable batteries, rotating through 3 distinct sets. Here is what his meticulous daily log reveals after years of use:

The Real-World Data
 Run Time: A pair of XTAR rechargeable lithiums delivers 28 to 30 hours of use per charge (roughly half the lifespan of the premium disposable).

 The "Top-Off" Strategy: To combat minor self-discharge while a set sits waiting in rotation, he uses an XTAR VX4 charger to "top off" the standby set right before putting them into the Alpha-Stim. This optimization consistently squeezes out a full 30 hours of use.

 Longevity: He has tracked 33 total set changes across his 3 sets, averaging 29 use-nights per charge over the lifespan of the batteries.

Doing the Math (Working Backward)
By tracking his 957 total daily set uses, we can map out exactly how long these three rechargeable sets have been in active service:

 $957(total uses)/30.41(average days per month) = 31.46 months
 $Total Time in Service: 2 years, 7 months, and 14 days (and still going strong!).

The Takeaway
Each of his 3 XTAR rechargeable sets has been cycled roughly 11 times. If he had used disposable Energizer Ultimate Lithiums for those same 957 nights, he would have burned through roughly 32 batteries—costing over $120.

Instead, his 3 sets of rechargeable XTARs paid for themselves almost immediately and continue to hold a stellar charge nearly 3 years later.

When managing chronic conditions with home health tech, don't just look at the upfront cost of the device. Track your consumables, do the math, and look for high-quality rechargeable alternatives. Your wallet will thank you.

Live sound engineer Jaroslav Pešek from Slovakia recently shared his experience with us using AA CLR 4300 batteries in real production environments, powering Wisycom MTP60 (50mW output) and Shure ADX transmitters (2mW output) across multiple wireless channels.

In his setup, runtime reached nearly 11 hours, showing a clear improvement compared to traditional NiMH batteries.

Anyone working in live sound knows the frustration — dead batteries mid-show, lost audio on performers, or batteries that weren’t replaced in time and end up damaged. In wireless audio, those small failures can become big problems very quickly. Reliable power removes that risk. It keeps the focus where it should be on the production, not the batteries.

Btw, may I know what audio devices do you personally use that relies on AA / AAA batteries? Welcome to comment below.

What batteries do you use for outdoor application in low-temperature environments? Some people may experience AA batteries draining much faster in freezing temperatures, or devices’ poor performance showing “low battery” even when batteries are still charged. The big problems with the batteries in cold outdoor environments is rapid voltage drop and reduced runtime.

Recently, we got some feedback from the Fabien Piege Photo. He has been using XTAR rechargeable AA CLR 4300mWh Li-ion batteries in GardePro trail cameras during winter conditions down to -20°C (-4°F). After several months outdoors and hundreds of captures, the batteries were still powerful.

There is a detailed comparison test video from Lumencraft where he compared multiple AA battery types including: Alkaline, NiMH, LiFeS2, Carbon-Zinc, Li-Ion, NIckel-Cadmium batteries. The takeaway seems to be that alkaline still only makes sense for cost, while rechargeable options are the better choice for performance and convenience.

As for rechargeable 1.5V AA Li-ion battery, he specifically recommended the XTAR 1.5V AA 4150mWh Li-ion batteries for devices that benefit from 1.5V stable voltage and strong performance. Please check more details online:

https://www.youtube.com/watch?v=xfJLZhUJwE8

A customer told when charging some of his AA NiMH batteries in the L4 PRO, the battery icons on the charger’s display start blinking, charging cannot proceed, and the charger eventually shows an “Err”. The polarity of the batteries was confirmed to be correct. Besides, when using the Refresh mode, the charger behaves the same way—quickly switching to “Err.”

Based on this information, one possible reason is that theses AA NiMH batteries may have high internal resistance. During the charger’s detection phase, the voltage fluctuate significantly, which could lead the L4 PRO to classify the batteries as abnormal and stop charging. Even if other chargers could charge these batteries, it doesn’t mean the batteries are in good condition. In many cases, high internal resistance also comes with noticeable heat during charging and a significant drop in capacity, which indicates aging or degradation. Then, these kind of batteries are not recommended to use again.

Besides, The “ERR” message on the L4 PRO charger may also be caused by inserting incompatible battery types, such as 3.6V Li-ion cells, 1.5V alkaline batteries, or 1.5V rechargeable carbon batteries, which are not supported by the charger.

A Canadian audio influencer recently tested 6 AA batteries in the Tascam FR-AV2 — a professional portable recorder, audio interface, and mixer in one. With its high power demands (48V Phantom Power + medium screen brightness), this device is a true stress test for batteries.

Here’s a snapshot of the results:
· XTAR CLR 4300: 8h 6min
· XTAR LR 3000 USB-C: 6h 21min
· Energizer NiMH: 5h 55min
· Energizer Alkaline: 5h 5min
· Duracell Alkaline: 4h 41min
· GreatValue Alkaline: 3h 38min

The CLR 4300 not only led the pack under high load, but in normal use conditions, runtime extends even further, over an additional hour.

For those interested, the full test video is available here:
https://www.youtube.com/watch?v=FUX8bxPnV_E

Reliable power matters in high-performance audio, whether on location or in the studio.

We want to share a very detailed independent test that might be useful for anyone working with AA/AAA 1.5V lithium rechargeable batteries. In this blog, there are comparisons covering 61 different models of 1.5V lithium AA/AAA rechargeable batteries, and it’s one of the most extensive datasets in this category. Please check details online: https://akkutests.de/vergleich2026.html

From these batteries’ energy testing, the top 10 1.5V AA models are mainly dominated by XTAR and Keeppower. For AAA batteries, the ranking list is much shorter because there are fewer models available on the market. In this category, XTAR clearly stands out as the most reliable option. The only close competitors are Dracutum / Photoolex, which can deliver similar energy output, but they don’t maintain a stable 1.5V output.

Glad to share we released the new L8 Pro charger, with eight slots for AA/AAA 1.2V NI-MH and 1.5V Li-ion batteries, engineered to handle the needs of both everyday users and professionals. Check more details online: https://www.xtar.cc/product/xtar-l8-pro-charger

Key Features:
* Wide Compatibility – charges both 1.2V Ni-MH and 1.5V Li-ion batteries in one device.
* Battery Revival Functions – eliminate memory effect with DisCHG Quick Repair and Refresh Deep Repair, extending Ni-MH battery life.
* Smart Charging – independent control of all 8 slots, intelligent full-charge detection, and mixed battery compatibility.
* Safety & Convenience – USB-C input, anti-reverse, short-circuit protection, and true 0V activation.
* HD display — real-time charging status at a glance.

Compared to entry-level 8-slot chargers, the L8 Pro adds battery repair capabilities at a mid-range price. Compared to professional models, it makes advanced battery care accessible to more users. It’s ideal for multi-child households, smart home setups, and outdoor enthusiasts needing to charge and maintain multiple batteries efficiently.

One of France’s well-known tech review channels, Bricolage c’est cool, recently made an in-depth comparison of USB-C lithium AA batteries against multiple well-known AA brands on the market, and the results were impressive.

In the test, XATR AA 4100 USB-C and AA LR 3000 USB-C batteries delivered the highest measured capacity among all tested models, while also showing the most stable performance under high-power loads.

Unlike traditional rechargeable batteries, USB-C lithium batteries feature a built-in charging system. No need dedicated charger, simply plug a USB-C cable directly into the battery for fast and convenient charging. The testing highlights a key advantage of rechargeable 1.5V lithium batteries: performance remains stable even in demanding devices where conventional batteries often struggle.

If you’d like to explore the full methodology and detailed results, watch the complete review here:

https://www.youtube.com/watch?v=psN65JE3iCQ

For safe and reliable charging of your Lithium batteries, it’s suggested to charge them around 10°C to 30°C (50°F to 86°F), and avoid charging below 0°C (32°F), as charging at low temperatures can significantly accelerate battery degradation and may even introduce safety risks.

This behavior is driven by the internal electrochemical mechanisms of lithium-ion cells.

* Slower Lithium-Ion Diffusion
At low temperatures, the electrolyte becomes more viscous and its ionic conductivity decreases. As a result, lithium-ion mobility is significantly reduced. During charging, lithium ions are unable to efficiently diffuse and intercalate into the graphite anode structure. This creates a bottleneck at the electrode surface.

* Lithium Plating on the Anode
When lithium ions cannot properly intercalate into the anode, they accumulate on the surface and are reduced into metallic lithium, a phenomenon known as Lithium Plating. This leads to several critical issues:

• Permanent capacity loss, as metallic lithium cannot be reversibly cycled
• Increased internal resistance
• Potential formation of lithium dendrites, which may pierce the separator and cause internal short circuits

* Instability of the SEI Layer
Under low-temperature charging conditions, the electrochemical reactions become unstable. The SEI layer may repeatedly break down and reform. This process consumes active lithium and leads to accelerated capacity fading, and increased impedance and reduced efficiency.

* Increased Polarization Effects
Low temperatures also increase internal resistance, resulting in stronger electrochemical polarization. This causes artificially elevated charging voltage, premature charge cut-off before full capacity is reached. Such conditions further promote lithium plating, creating a compounding degradation effect.

To ensure optimal performance and longevity, pls kindly allow the Lithium batteries to return to ambient temperature.

Sharing a detailed review of the xtar AA 1.5V 3600 Lithium battery, which is the industry's first battery with touch-activated power level display. Admiral134 performed a full series of tests including capacity, discharge current, internal resistance, and thermal behavior in his video.

Some discharge tests were carried out with the HIT ASK 2.5.10.8 battery analyzer under several current loads: 0.5A, 1A, 2A, 2.5A, and 3A. At 0.5A discharge, the measured capacity was around 2415–2475 mAh, very close to the rated capacity. Even at 3A high-current discharge, the battery still delivered around 1970 mAh.

Please check more info online: https://www.youtube.com/watch?v=WIRDewAY1qM 

We recently received the feedback from a custome. He used the BC8 charger to charge his AA batteries and notice something interesting. He got the XTAR 1.5V 4150mWh AA Li-ion batteries and IKEA 1.2V NiMH batteries fully charged in the BC8. Then he put the batteries in his device, while found the device showed 97% charge with XTAR 1.5V 4150mWh AA batteries; 80–90% charge with IKEA NiMH 1.2V batteries. So why weren’t they showing 100%?

In fact, some devices estimate battery charger percentage based on the batteries’ voltage level. Those electronic devices are designed to support multiple types of batteries, such as Alkaline, 1.5V Li-ion, 1.2V NiMH AA. These different batteries have different full-charge voltages. If the device uses alkaline batteries as its standard, it may show different charge level with other battery types. The percentage reading would simply be a voltage interpretation issue, not a charging problem.

Here’s what typically happens:
Alkaline AA (new): around 1.60V
→ Device reads this as 100%

XTAR 1.5V 4150mWh Li-ion AA (fully charged): 1.5V
→ Slightly lower than alkaline
→ Device may show around 95–98%

NiMH 1.2V AA (fully charged): around 1.40–1.45V
→ Much lower than alkaline
→ Device may show 80–90%

Glad announce our new C4-AA charger, specially designed for XTAR AA 1.5V Li-ion batteries.

* Affordable & Accessible: For anyone looking to try XTAR 1.5V AA Li-ion without investing in expensive chargers, the C4-AA is the perfect option.
* USB-C Convenience: Comes with a built-in USB-C cable — charge from an adapter, computer, or power bank anytime.
* Compact & Practical: Open-frame design makes inserting and removing batteries easy, while keeping them cool during charging.

Learn more here: https://www.xtar.cc/product/xtar-c4-aa-charger

Recently, we got some feedback from a customer about his L4 charger. He told his charger sometimes failed to charge, or the red charging light stayed on for a long time. To find ou the problem, we carefully examined his returned L4 charger.

Upon inspection, we found that the positive contact of the charger had dirt and debris stuck on it, preventing proper contact between the batteries and the charger’s positive terminals. After cleaning the contact points, multiple cycles of battery charging and aging tests returned normal results.

To avoid such charging issues, there are some suggestions:
*Please keep both battery and charger contacts clean. Dirt or residue on the positive or negative terminals can block proper contact.

* Persistent dirt may damage the charger plating. Over time, stuck debris may even damage the metal plating, which is hard to restore.

* If you experience similar issues, you can check and clean the contact points yourself, try to resolve the problem.

For charging Ni-MH batteries, XTAR adopts the unique CVSA tech to enable lower body temperature of Ni-MH battery, ensure stable and fast charging, extending battery lifespan. There is the L4 Pro charger testing by Dr. lui_gough. He charges a nearly-empty Sanyo Eneloop (1st Generation) cell under the watchful eye of a Thermal Master P3 USB-C thermal camera.

https://goughlui.com/wp-content/uploads/2025/11/vx4charge-anim.gif

“In the animation, we can see just how the charger was the warmest thing in the region, only until the final part of the charge where the cell reached a high below 29 degrees Celsius, in a room measuring about 24 degrees Celsius. This is pretty cool compared to some older Ni-MH chargers which can absolutely cook the cells, roasting them up to 50 degrees Celsius or so, which is good news for longevity. It’s also pretty complete with charging, taking about 3.5 hours which, at 500mA, would mean 1750mAh delivered which is quite close to the full 2000mAh capacity. But being a cell over a decade old and not being completely flat to begin with, this result suggests it got a full charge. It’s also noted that leaving the cell on the charger after completion where some trickling or charging restarts could happen, this did not seem to create any thermally noticeable increases in cell temperature. As a result, I can confirm that this charger treats Ni-MH quite well.

It is rather friendly and gentle on Ni-MH cells, as it uses XTAR’s CVSA technology, but also features additional discharge and refresh modes to get the most out of them.”

Check more info here:
https://goughlui.com/2025/12/02/quick-review-xtar-l4-pro-1-2v-ni-mh-1-5v-li-ion-aa-aaa-smart-battery-charger/

There is the XTAR 1.5V AA LR 3000mAh USB-C Li-ion Battery Test by Dr. Gough Lui. Welcome to check more details online:

https://goughlui.com/2025/11/20/review-xtar-1-5v-aa-lr-3000mah-usb-c-rechargeable-li-ion-battery/

In his testing, the cells consistently above the 3000mAh rating, achieving an average just over 3100mAh. The cycle life tests also produced quite positive results, suggesting over 1,700 cycles may be possible based on the measured rate of degradation. It’s useful in appliances which utilise voltage to indicate remaining charge level and are not particularly picky about having a fixed 1.5V.

You got too many batteries to tell which one still has power? We released the industry's first battery with touch-activated power level display - XTAR AA 1.5V 3960 Battery. Simply touch the positive terminal to instantly see the power level and stay in control anytime.  

This new xtar AA Li-ion battery has 2500mAh high capacity, delivers 1.5V constant voltage output and max 3A discharge current. With low battery indicator, it can provide warning that the battery needs to be recharged and prevent devices sudden shutting off. So it’s more reliable and powerful than regular NiMH and alkaline AA/AAA cells, very suitable for devices that require long-term, steady high-voltage output. 

Pls check details online: https://www.xtar.cc/product/xtar-aa-1-5v-3960-battery.html

Ever wondered how a high-performance lithium battery is made? We’ve just released a behind-the-scenes video showing the full production process.

With strict quality control at every stage, XTAR batteries are now trusted across multiple industries, including hunting & trail cameras, pro audio & field recording, medical devices, and optical & imaging gear.

Explore more XTAR battery resources:
• Battery Tech: https://www.xtar.cc/why-choose-xtar-batteries
• Battery Blog: https://www.xtar.cc/battery-knowledge

https://www.youtube.com/watch?v=t2AhdnB1m80

Tired of messy AA/AAA batteries and slow charging solutions?
Here, our newest XTAR L8 Box combines charging and storage in one compact case, making AA/AAA batteries management smarter, safer, and easier.

Check more details online: XTAR L8 Box Charger - XTAR

Main Features:

• Biggest compatibility: Charges up to 8 batteries at once, supporting different brands 1.5V lithium and 1.2V Ni-MH AA/AAA batteries.
• Fast charging: 2.6 hours to fully charge, an ordinary charger needs 5-6 hours.
• Intelligent protection mechanism: Built-in multiple protections to prevent overcharging / over-heating and ensuring safety.
• Intuitive LED indicator for each battery: Keep you informed of the charging level.
• Outstanding appearance with patented design: It can be used as a storage case and desktop decor. The magnetic lid allows easy one-handed operation, providing unmatched convenience.

Originally priced at $29.99, enjoy our exclusive early bird offers now!
From September 24 to September 30: Only $9.99; Limited to 500 units
Buy Here:
https://xtardirect.com/products/xtar-l8-box-8-slot-rechargeable-battery-charger-for-aa-aaa-15v-li-ion-and-12v-ni-mh-batteries?VariantsId=12041

AA and AAA rechargeable batteries are widely used in various household and professional devices. Choosing the right charger is essential to maintain battery performance, extend lifespan, and ensure safe charging. There is comparison chargt of different AA battery chargers, based on user reviews and technical specifications collected online.

More details online:
https://www.xtar.cc/news/rechargeable-aa-battery-charger-comparison-xtar-vs.-ebl-vs.-others.html