Tenergy T9688 Smart Battery Charger

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85%
91%
Ease of Use
88%
Value for Money
85%
Charging Performance
93%
Safety Features
80%
Build Quality
89%
Portability & Size
90%
Compatibility
87%
USB Charging Functionality
91%
Display & Monitoring
78%
Customer Support & Warranty
65%
9V Battery Charging Accuracy
82%
Design & Aesthetics
More

Overview

The Tenergy T9688 Smart Battery Charger offers a versatile charging solution for a wide range of rechargeable batteries. This universal charger supports AA, AAA, C, D, and 9V batteries, making it suitable for various devices in your household. With a clear LCD display showing real-time charging status and notifications, it’s easy to monitor progress. The charger also features automatic charge/discharge functions that simplify the user experience, while its compact and lightweight design makes it ideal for everyday use. Plus, the built-in USB port provides the convenience of charging portable devices like smartphones.

Features & Benefits

The Tenergy charger is designed to provide an efficient and safe charging experience. It automatically selects the appropriate current based on the battery size, ensuring optimal charging for AA, AAA, C, D, and 9V cells. Safety is prioritized with features like short circuit protection and negative delta V cut-off, which helps prevent overcharging for AA/AAA/C/D batteries. With four charging slots and dual channels for 9V batteries, the charger can handle multiple batteries at once. Additionally, the USB output functionality makes it possible to charge devices such as phones, providing extra versatility.

Best For

This universal charger is perfect for users who need to charge multiple battery types in a single device. It suits those with a mix of AA, AAA, C, D, and 9V rechargeable batteries, whether for household gadgets or larger equipment. It’s especially useful for tech enthusiasts who want a reliable and multifunctional battery charger with added features like the USB port for charging portable electronics. The compact design also makes it a great option for homes and offices that require an efficient and space-saving charging solution.

User Feedback

Users generally appreciate the Tenergy T9688 for its ease of use and safety features, with many highlighting the clear LCD screen as a standout feature. The compact size makes it ideal for tight spaces, which is a plus for many buyers. However, some users have reported occasional issues with 9V battery charging accuracy, with a few stating that their batteries didn’t charge fully or properly. While the charger works well for most standard rechargeable batteries, these inconsistencies with 9V batteries were a noted downside for some users, although overall satisfaction remains high.

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

Pros

  • This universal charger is compatible with a wide range of battery types, including AA, AAA, C, D, and 9V, making it highly versatile.
  • The built-in LCD screen clearly displays charging status and notifications, allowing for easy monitoring.
  • Automatic charge and discharge functions simplify usage, making it beginner-friendly for those new to battery charging.
  • Compact and lightweight, this charger is perfect for households or offices with limited space.
  • With a USB port, this charger can also power small devices like smartphones, adding extra functionality.
  • The charger features built-in safety protections, such as short circuit protection and negative delta V cut-off, to prevent overcharging.

Cons

  • Some users experienced slow charging times, particularly when charging 9V batteries.
  • The device may not be ideal for those looking for rapid, high-performance charging for large battery quantities.
  • While compact, the charger may still be too bulky for very tight spaces, especially in portable setups.
  • A few customers reported accuracy issues when charging 9V batteries, which affected their charging expectations.
  • The charger’s design may not appeal to those seeking a sleeker, more modern appearance for their devices.
  • It may not be the best option for users who only need to charge one type of battery, as it’s geared towards multiple battery sizes.

Ratings

After analyzing verified user reviews from multiple global sources, the feedback on the Tenergy T9688 Smart Battery Charger highlights its functionality and user-friendly design, with strengths in safety features and versatility. Reviews were filtered to exclude spam, bots, and exaggerated claims, ensuring the results reflect real user experiences. While most praise its reliability, some pain points, such as occasional issues with 9V battery charging accuracy, were also noted across various languages and platforms, influencing the scores in specific areas.

Ease of Use
91%
Many users appreciate how simple and intuitive this charger is to use. The automatic charge/discharge functions make it incredibly convenient for everyday tasks, while the LCD display ensures that users can monitor the charging status with ease. The compact design adds to its practicality, making it ideal for households with limited space.
While most users find the charger easy to operate, a few mention that the setup could be confusing for first-time users. The instructions are sometimes seen as unclear, and some buyers report minor difficulties understanding the charging progress on the screen, especially when multiple batteries are involved.
Value for Money
88%
Customers generally agree that this device offers great value for the price. It combines functionality for multiple battery types with a built-in USB port for charging small devices, making it a versatile tool for homes or offices. Many buyers feel they get their money's worth with its all-in-one design and efficient performance.
Despite its broad appeal, some users feel that the price is slightly high compared to other basic battery chargers. A few mention that while it offers a lot of features, it could be more cost-effective for those only needing to charge a single battery type regularly.
Charging Performance
85%
The charger is praised for its efficient charging capabilities. Users appreciate how quickly it charges different battery sizes, especially AA and AAA batteries. The ability to charge four batteries at once without compromising performance is a big plus for many, making it a reliable choice for regular use.
Some users report slower charging times than expected, particularly for larger batteries like C and D cells. A few also mention that it takes longer to charge 9V batteries, which may not meet the expectations of those who need a quick power-up for specific applications.
Safety Features
93%
This charger stands out for its built-in safety features, including short circuit protection and the negative delta V cut-off. These mechanisms help prevent overcharging and ensure that the batteries are safely charged. Many users feel reassured by these protections, especially when using the device with multiple battery types at once.
Although most users are satisfied with the safety features, a few mention that the charger occasionally struggles to recognize the status of some batteries, leading to errors in charging. In rare cases, the device may continue charging beyond the intended cutoff, raising concerns about long-term battery health.
Build Quality
80%
20%
Users generally appreciate the solid build of this charger. It feels sturdy, and the compact design ensures it doesn’t take up too much space. The plastic housing is robust enough for regular home use, and it doesn’t feel flimsy or prone to breaking with typical handling.
Some buyers note that while the build is generally good, the plastic casing could feel a little more premium. A few users also mentioned that the charger’s weight is slightly on the heavier side compared to other similar models, which could be a concern for those looking for a lightweight option.
Portability & Size
89%
One of the standout features for users is the charger’s compact design. It’s small enough to fit into tight spaces but powerful enough to charge multiple batteries at once. The portability makes it a great choice for travel or for those with limited countertop or desk space.
While the size is generally a benefit, some users find that the charger’s design doesn’t allow for easy storage of cables or other accessories. The compact form can make it harder to keep everything organized, especially for users who have to plug it in and out frequently.
Compatibility
90%
Users appreciate how versatile this charger is, compatible with AA, AAA, C, D, and 9V batteries. This makes it a go-to option for households or offices that use a wide variety of rechargeable batteries. Its ability to charge multiple battery sizes simultaneously is a major convenience for users with diverse needs.
While the charger is compatible with a wide range of batteries, some users report that it has trouble charging certain 9V batteries. This issue, though not widespread, can be frustrating for those who rely on this charger for 9V power sources.
USB Charging Functionality
87%
The built-in USB port is a big bonus for those who need to charge their devices on the go. Users find it particularly useful for charging phones, cameras, and other small electronics. This feature adds a layer of convenience, making the charger a multi-functional tool for everyday use.
A few users mention that the USB output is slower than expected, especially for devices that require more power. Some buyers would prefer a faster charge for their smartphones or tablets, though this issue isn’t a dealbreaker for most.
Display & Monitoring
91%
The LCD screen provides clear and easy-to-understand feedback on the charging process. Users like being able to monitor the status of each battery, with notifications that help prevent overcharging. The screen’s simplicity and readability are particularly appreciated by those who prefer a visual overview of their charging process.
A small number of users have mentioned that the display can be hard to read in dim lighting or from certain angles. Some feel the contrast could be improved to make the information clearer, especially for those who use the charger in poorly lit spaces.
Customer Support & Warranty
78%
22%
Most users report that the product works as expected and doesn’t require frequent customer support. When users do reach out for assistance, the support team is generally responsive and helpful, offering solutions to any issues.
A few buyers have had less-than-ideal experiences with customer service, citing long response times or insufficient help. Some users also mention that the warranty could be more comprehensive to cover potential issues that arise after extended use.
9V Battery Charging Accuracy
65%
35%
When the charger works well, it does a solid job charging 9V batteries. The inclusion of dual channels for these batteries is a nice feature, and when it functions properly, it adds to the device’s versatility.
However, some users have reported inaccurate charging when it comes to 9V batteries. These issues range from overcharging to failure to charge the battery altogether. This has led to some frustration, especially for users who rely on 9V batteries in their daily devices.
Design & Aesthetics
82%
18%
The design of this charger is sleek and modern, fitting well with most home or office setups. Its simple appearance, combined with the compact size, makes it an attractive and unobtrusive addition to any space.
While the design is generally appreciated, some users feel the aesthetics could be improved. A few buyers noted that the plastic feel and lack of premium finishes could make it seem less high-end compared to other chargers in its price range.

Suitable for:

The Tenergy T9688 Smart Battery Charger is ideal for users who need a versatile charging solution for multiple battery types. It's particularly beneficial for households or small offices with diverse rechargeable batteries, as it supports AA, AAA, C, D, and 9V sizes. This charger’s compact design and additional USB port for powering devices like smartphones make it convenient for people who need an all-in-one device without cluttering their workspace. Tech enthusiasts who appreciate a reliable, easy-to-use device with safety features and clear charging status monitoring will find this charger valuable. It also suits those who require efficient charging without worrying about overcharging or short circuits, thanks to its built-in protections.

Not suitable for:

However, this charger may not be the best option for users with a primary focus on fast charging, especially for 9V batteries. Some customers have noted slower charging speeds and occasional issues with 9V battery accuracy, making it less suitable for those who need rapid turnaround times. Additionally, users who require a lightweight, travel-friendly charger may find this model a bit bulky. While its compact design is convenient for home use, the charger’s weight and size could pose challenges for frequent travelers or those with very limited space. Finally, if you only use one battery type, this universal charger may feel unnecessary, especially considering its slightly higher price compared to single-battery chargers.

Specifications

  • Battery Types: Compatible with AA, AAA, C, D, and 9V rechargeable batteries.
  • Display: Features an LCD screen that shows charging status and notifications.
  • Charging Slots: Has 4 charging slots for simultaneous battery charging.
  • Channels: Includes dual channels for 9V battery charging.
  • USB Output: USB output is 5V DC at 500mA for charging small electronic devices.
  • Input Voltage: Operates on an input voltage of 12V DC at 1000mA.
  • Charge Current: The charge current is 500mA for AA/AAA batteries, 1300mA for AA/C/D batteries, and 30mA for 9V batteries.
  • Discharge Current: Discharge current is 400mA for AA/AAA/C/D batteries.
  • Overcharge Protection: Includes negative delta V cut-off to prevent overcharging of AA/AAA/C/D batteries.
  • Safety Features: Equipped with short circuit protection for added safety during charging.
  • Dimensions: Measures 2.5 x 7 x 5 inches, making it compact and space-efficient.
  • Weight: Weighs 1.25 pounds, making it lightweight and easy to handle.
  • Auto Current Selection: Automatically selects the appropriate current for different battery sizes.
  • Discharge Function: Features automatic charge/discharge functions for ease of use.
  • Compatibility: Ideal for households or offices with a variety of rechargeable battery types.
  • Portability: Compact and lightweight, making it suitable for travel or small spaces.
  • Charger Type: A universal smart charger capable of charging multiple battery types at once.

FAQ

Using this charger is straightforward. Simply insert your AA, AAA, C, D, or 9V batteries into the designated slots, ensuring correct orientation. The LCD display will show the charging status, and the device automatically adjusts current for the battery type. For USB charging, just plug in your device to the USB port.

Yes, the Tenergy charger is compatible with a wide range of rechargeable batteries including AA, AAA, C, D, and 9V types. It automatically selects the appropriate current for each battery size, ensuring safe and efficient charging.

The Tenergy charger includes several built-in safety features such as short circuit protection and a negative delta V cut-off, which prevents overcharging. These features help protect both your batteries and the charger itself, making it a reliable option for long-term use.

Yes, this charger has 4 charging slots and can handle different battery sizes simultaneously. It adjusts the charge current based on the battery type, so you can charge AA, AAA, C, D, and 9V batteries all at once without any issues.

Charging time depends on the battery type and capacity. For AA and AAA batteries, it typically takes about 4-5 hours, while larger C and D batteries may take longer. 9V batteries generally require a longer charge time, around 6-8 hours.

Yes, the Tenergy charger includes a power adapter that allows it to be plugged into a standard outlet. The input voltage for the charger is 12V DC, and the adapter is designed to work with the charger for reliable performance.

Yes, this device has a USB port that allows you to charge smartphones and other small electronic devices. The USB output is 5V DC at 500mA, which is suitable for most small devices.

It is strongly recommended to only use rechargeable batteries in this charger. Inserting non-rechargeable batteries can result in damage to the charger or the battery itself. The charger is designed to detect incompatible batteries and may not charge them.

Yes, the Tenergy charger is compact and lightweight, making it a good option for travel or portable setups. With dimensions of 2.5 x 7 x 5 inches and weighing only 1.25 pounds, it can easily fit into a travel bag or suitcase.

While the Tenergy charger offers efficient and reliable charging, it does not support rapid charging. It is designed to prioritize battery safety and longevity, meaning charging times may be longer compared to fast-charging models, especially for larger batteries like 9V.