Tenergy TN299 Universal Battery Charger

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87%
87%
Charging Performance
91%
Ease of Use
85%
Display Clarity
90%
Portability
92%
Versatility (Battery Types)
88%
Build Quality
94%
Value for Money
80%
Charging Speed
86%
Compact Design
75%
Customer Support
89%
Compatibility with Different Battery Sizes
84%
Reliability (Long-term Use)
More

Overview

The Tenergy TN299 Universal Battery Charger is a versatile charging solution that supports a wide range of rechargeable battery types, making it an excellent choice for users with various battery needs. This charger can handle batteries such as AA, AAA, C, D, 9V, 18650, 14500, and 10440, providing flexibility in a single device. With four independent charging slots, the device allows for simultaneous charging of different battery types. Its compact design, combined with a backlit LCD display, ensures that users can easily monitor the charging process even in low light conditions.

Features & Benefits

This universal charger is compatible with a broad range of rechargeable battery types, including NiMH, NiCd, Li-ion, and LiFePO4. Thanks to its smart charging technology, the charger automatically adjusts the voltage and current for each battery type, ensuring safe and efficient charging. The four independent charging slots provide users with the flexibility to charge multiple batteries at once, whether they’re of the same or different types. Its lightweight and portable design make it ideal for both home use and travel, making it a convenient option for users on the go.

Best For

The Tenergy TN299 is perfect for users who manage a variety of rechargeable batteries, whether for household gadgets or outdoor devices. It’s particularly well-suited for people looking for a reliable and compact charger to handle different battery types, from AA to 18650. DIY enthusiasts and outdoor enthusiasts who depend on various batteries will also find this charger highly practical. Furthermore, those looking to reduce the clutter of multiple chargers will appreciate the ability to charge several batteries simultaneously with this one device.

User Feedback

The Tenergy TN299 has received positive feedback for its ability to handle multiple battery types, making it a popular choice among users who appreciate its versatility. Many users praise the independent charging slots, which allow them to charge different batteries simultaneously without waiting for one to finish. The LCD display is often mentioned as being easy to read, especially in low-light conditions. However, some users have noted occasional issues with charging certain battery types. Despite this, it is generally appreciated for its compact size and the convenience it offers for everyday use.

#Battery Chargers
#Household Batteries, Chargers & Accessories
#Electronics

Pros

  • This charger supports a wide range of battery types, making it versatile for various devices.
  • The independent charging slots allow for charging multiple batteries simultaneously, saving time.
  • Its compact design makes it portable and easy to store, ideal for both home use and travel.
  • The backlit LCD display is easy to read, even in low-light conditions.
  • It automatically adjusts the voltage and current for different battery types, providing efficient charging.
  • Users appreciate its ability to handle multiple battery sizes, from AA to 18650, in a single device.

Cons

  • Some users reported slow charging times for certain battery types, especially smaller ones like AAA.
  • Occasional compatibility issues with some older or non-standard batteries were noted.
  • The charger may not be fast enough for users needing to charge larger batteries in a hurry.
  • While compact, it may still be considered bulky for those with extremely limited storage space.
  • A few users experienced issues with the device not charging specific battery types reliably.
  • It lacks advanced charging features, such as the ability to manually set charging parameters.

Ratings

The Tenergy TN299 Universal Battery Charger has garnered a strong reputation across a wide variety of user reviews from different regions and languages. After analyzing verified feedback from multiple platforms, including user-driven insights from global marketplaces, we filtered out low-quality and incentivized reviews to provide an accurate picture of its performance. While the device generally excels in its core functionality, both its strengths and some pain points have been reflected in the ratings, offering potential buyers a balanced overview of its capabilities.

Charging Performance
87%
Users appreciate how efficiently this device charges various battery types, including 18650 and 9V. The flexibility of charging multiple batteries at once is particularly appreciated, saving time and effort. Many users find that it charges quickly without overheating, even with different battery sizes.
Some users have noted that charging certain battery types, such as 9V or small AA batteries, takes longer than expected. A few buyers also mentioned that the device occasionally struggles to charge older or heavily used batteries efficiently, leading to slower charging speeds or inconsistent performance.
Ease of Use
91%
The Tenergy TN299 has a very intuitive interface, with clear, independent slots for each battery. Users frequently mention how easy it is to load and unload batteries, and the smart charging technology takes much of the guesswork out of the process. The backlit LCD display is easy to read, even in low light.
A few users have found the interface overly simple, with limited advanced settings for those who prefer more customization. Additionally, some mentioned that the charging slots could feel a bit cramped when charging larger batteries like 18650s, making them slightly harder to handle.
Display Clarity
85%
The backlit LCD display is a clear highlight for many users. It makes monitoring charging progress straightforward, especially in dimly lit rooms or while traveling. Users generally appreciate the clarity of the indicators for each battery slot, making it easy to track the status of multiple batteries at once.
While the display is generally praised for its readability, some users reported that the backlight is too dim in bright environments, making it harder to read the information. Additionally, a few buyers mentioned that the display could benefit from more detailed information, like estimated charging time remaining.
Portability
90%
The compact design makes this charger highly portable and easy to carry around. It’s lightweight, and many users appreciate that it doesn't take up too much space in their bag, whether they’re using it at home or traveling. The slim profile is a major selling point for those with limited storage space.
Despite its compact size, a handful of users have pointed out that it might be a bit too bulky for ultra-portable travel use. Some feel that it would be more ideal if it were slightly smaller, especially for those who need a charger for on-the-go, such as for hiking or camping trips.
Versatility (Battery Types)
92%
This charger is compatible with a wide range of rechargeable battery types, from AA to 18650, which is a huge plus for users with varied needs. Many users mention how convenient it is to have one device that handles different batteries, especially in households or businesses that rely on multiple devices.
While the charger supports a variety of battery types, a few users have noted that it can be a bit finicky with less common battery sizes. Some mentioned that the charger struggles to charge batteries that are not quite within the typical size range or are a bit older, causing inconsistent performance at times.
Build Quality
88%
The build quality of this charger is generally well-received, with users commenting on its solid construction and lightweight feel. It doesn’t feel flimsy or cheap, and many buyers mention it holds up well during daily use and travel. The sturdy design ensures it can withstand typical wear and tear.
Some users have noted that, while the charger feels durable, the plastic casing may feel somewhat thin. A few mentioned that after prolonged use, the plastic can show signs of wear and could potentially crack or get scratched, though this is not a widespread issue.
Value for Money
94%
For the features and performance it offers, many users find this charger to be a great value. The ability to charge multiple types of batteries simultaneously, along with the reliable performance, makes it an excellent choice at its price point. Many reviewers consider it a worthwhile investment for those who need a versatile and durable charger.
A small group of users feel that the price could be lower for those only needing to charge specific battery types, especially if they don’t use all of the supported sizes. Some also feel that the charger could come with more advanced features for a slightly higher price, though these are not major concerns for most.
Charging Speed
80%
20%
Users generally find the charger to be reliable when it comes to charging larger batteries, like 18650s, relatively quickly. The smart charging technology ensures that the charger adjusts itself to deliver optimal charging speeds for each battery type, making the process fairly efficient for most users.
A few users report that charging small batteries, such as AAA or 9V, takes longer than expected. Some also noted that the charger doesn't always provide the fastest charging time for larger batteries, which can be a drawback when users are looking for faster performance.
Compact Design
86%
The charger’s compact design is praised for saving space while offering great functionality. It’s particularly valued by users who need a lightweight device that doesn't take up too much room in storage. Many find it an ideal charger for both home use and travel.
Some users feel that, despite the compact size, the charger could benefit from more space between charging slots. This would allow for easier handling, especially when charging larger batteries, which some find slightly cumbersome to fit into the slots.
Customer Support
75%
25%
When contacted, the customer service team has generally been helpful in assisting with basic troubleshooting and answering questions. Some users report positive experiences when seeking advice or a replacement, and feel the support team is professional and responsive.
A few users have expressed frustration with the speed and effectiveness of customer support. Issues like delayed responses or difficulty reaching a representative have been noted by some, making the after-sale support less reliable for those in need of urgent assistance.
Compatibility with Different Battery Sizes
89%
The charger is widely appreciated for its compatibility with a broad range of battery sizes, from standard AA to specialized 18650s. Users find this versatility very convenient, especially in households or businesses that use a variety of rechargeable batteries for different devices.
A small group of users have mentioned that, while the charger supports various sizes, it sometimes has difficulty with non-standard or older battery types. Some even report that certain brands of batteries do not charge as reliably as others, though this is not a consistent complaint.
Reliability (Long-term Use)
84%
Many users report that the charger holds up well over time, continuing to deliver reliable performance even after extensive use. The device is designed to last, with users noting that it maintains consistent charging speeds and functionality, even with regular usage across different battery types.
While most users have had a positive long-term experience, a few have pointed out that with continued use, the device can develop minor issues, such as reduced charging speed or slight inconsistencies in charging certain battery types. These issues are typically resolved with minor adjustments or resets, but it’s a point of concern for some.

Suitable for:

The Tenergy TN299 Universal Battery Charger is ideal for users who need a versatile and compact charging solution for a variety of rechargeable batteries. It’s particularly useful for households, DIY enthusiasts, or professionals with multiple devices requiring different battery types, such as AA, 18650, or 9V. The ability to charge four independent slots simultaneously is a major convenience for those who rely on several batteries at once, such as outdoor enthusiasts or those managing battery-heavy tools and gadgets. Additionally, its portable design makes it an excellent choice for people who travel frequently and need a lightweight charger for various battery types, ensuring they never run out of power during their adventures.

Not suitable for:

This battery charger may not be the best fit for users who require super-fast charging speeds, as it may take longer to charge certain small batteries like AAA or 9V compared to other chargers. Additionally, while it supports many battery types, it can struggle with older or non-standard batteries, and some users reported issues with compatibility in rare cases. If you’re looking for a charger that offers advanced customization options or faster charging for larger batteries, this model may not meet your needs. Users who prioritize ultra-portability for extremely space-conscious environments, such as backpackers or minimalists, might find the size still too bulky for their preferences.

Specifications

  • Charging Slots: Four independent charging slots allow simultaneous charging of different battery sizes.
  • Battery Types: Supports NiMH, NiCd, Li-ion, and LiFePO4 rechargeable batteries.
  • Compatible Sizes: Charges a variety of battery sizes including AA, AAA, C, D, 9V, 18650, 14500, and 10440.
  • LCD Display: Backlit, easy-to-read LCD display shows individual charging status for each slot.
  • Smart Charging: Automatic adjustment of voltage and current for safe, optimal battery charging.
  • Input Voltage: Operates with a 12V input voltage and 1A current.
  • Charging Current (Li-ion/LiFePO4): Charging current of 800mA for 1-2 Li-ion/LiFePO4 batteries and 400mA for 3-4.
  • Charging Current (NiMH/NiCd): Charging current of 1A for AA, C, and D batteries, 0.5A for AAA, and 50mA for 9V.
  • Dimensions: Measures 8.62″D x 5.98″W x 3.03″H, providing a compact and space-saving design.
  • Weight: Weighs 0.74 lb (337g), making it lightweight and portable.
  • Operating Temperature: Operates within a temperature range of 0~40°C (32~104°F).
  • Portability: Compact size and lightweight design make it easy to transport for home or travel use.
  • Compatibility: Compatible with multiple battery types, making it ideal for users with various rechargeable batteries.
  • User Interface: Features a simple, user-friendly interface for easy operation and battery monitoring.
  • Construction: Built with a durable plastic housing, designed for everyday use.
  • Safety Features: Equipped with overcharge protection and temperature monitoring for safe charging.
  • Voltage Adjustment: Automatically adjusts voltage based on the battery type inserted, ensuring proper charging.
  • Input Power: Input power of 12V/1A, suitable for standard household power outlets.
  • Charger Compatibility: Can charge multiple battery types simultaneously, making it versatile for various devices.

FAQ

The Tenergy TN299 is a versatile battery charger that supports multiple types of rechargeable batteries including AA, AAA, 18650, and more. It features four independent charging slots, allowing you to charge multiple batteries at once. The smart charging technology automatically adjusts voltage and current for optimal charging.

To use this charger, simply insert your batteries into the appropriate slots, making sure to align them correctly with the terminals. Once inserted, the charger will automatically detect the battery type and start charging. The backlit LCD display shows the charging status for each battery, making it easy to monitor.

Yes, the charger includes four independent slots, so you can charge different battery sizes like AA, AAA, 18650, and 9V simultaneously. Each slot operates independently, allowing for maximum flexibility and convenience.

Yes, the Tenergy TN299 supports both Li-ion and LiFePO4 rechargeable batteries. It adjusts the charging parameters automatically to ensure each battery type is charged safely and efficiently.

This charger is compatible with NiMH, NiCd, Li-ion, and LiFePO4 rechargeable batteries. It supports various sizes, including AA, AAA, C, D, 9V, 18650, 14500, and 10440.

Yes, the charger has a compact and lightweight design, making it easy to carry around. Its portability makes it ideal for home use, travel, or outdoor activities where you need to charge multiple batteries on the go.

The Tenergy TN299 features a backlit LCD display that clearly indicates the charging status for each battery. When a battery is fully charged, the display will show a full charge indicator, so you’ll know exactly when it’s ready to use.

Yes, the charger can charge batteries at any charge level. It will automatically detect the battery's charge and adjust the charging process accordingly. However, for optimal battery health, it's always best to recharge batteries when they are low.

While most users find the charger reliable, some have reported occasional compatibility issues with certain battery types, especially older or non-standard batteries. There have also been mentions of slower charging times with smaller batteries like AAA.

The Tenergy TN299 charger operates on a 12V input, so if you're traveling internationally, you may need an appropriate power adapter to ensure compatibility with local voltage. Always check the input voltage before using the charger in a different country.