Tenergy TN141 2 Bay 9V Smart Charger with 4 pcs Centura Low Self-Discharge 9V NiMH Rechargeable Batteries
Quick take
The Tenergy TN141 bundle pairs a compact 2-bay 9V NiMH charger with four low self-discharge (LSD) 9V rechargeable batteries. It is a convenient option if you want to keep multiple 9V devices running without constantly buying disposable cells, and you value independent charging with LED status feedback. The main caveat is that rechargeable 9V batteries generally will not behave like fresh non-rechargeables in terms of long shelf life.
Pros and cons
Pros
- Two independent charging channels with LED lights for each battery’s status.
- Powered via micro-USB, making it easier to recharge anywhere with a USB connection.
- Buyers report the batteries charge quickly enough for routine use and do not feel unusually hot during charging.
- Includes four Centura low self-discharge 9V NiMH batteries in the bundle.
Cons
- Charging is limited to two batteries at a time (2-bay design).
- Rechargeable 9V batteries typically have different “run time versus fresh disposable” expectations.
What buyers think
Buyer-review evidence is strongly focused on charging behavior, build quality, and day-to-day usability. Shoppers frequently describe the charger as small and easy to use, with clear LED status changes while batteries charge and when charging completes. Multiple buyers note that batteries charge fully in practical timeframes and that the charger and cells do not get excessively hot. Reviews also point to the overall bundle value, especially for people who need repeated replacement of standard rectangular 9V cells. At the same time, some reviewers set expectations that 9V NiMH rechargeables will not last as long between charges as non-rechargeable 9V batteries.
What you’re getting
This bundle includes the Tenergy TN141 2-bay smart charger plus four 9V rechargeable batteries (Centura low self-discharge, NiMH). The charger’s key feature is independent charging for each bay, with LED status indicators to help you tell when each battery is actively charging, complete, or inserted incorrectly.
Charger design and operation
Independent 2-bay charging with status lights
The TN141 charges two 9V batteries at once, and it does so per-bay rather than in a single shared charging cycle. The LEDs are designed to show each battery’s state, including when charging is finished. That can reduce guesswork if you only need to charge one battery today and keep the second in a “ready later” rotation.
Micro-USB power for flexible placement
The charger uses a micro-USB input. In practical terms, it can be convenient if you have a USB power source available near where you keep your 9V devices (alarms, clocks, toys, controllers, and other household electronics).
Charging behavior and heat
Reviews commonly mention that the system completes charging without creating noticeable heat. One review also describes automatic shutoff behavior (not only relying on voltage cutoff, but also using a safety timer approach). While you should still follow best practices for NiMH charging and avoid charging hot batteries, this type of control is aligned with everyday safety expectations for a smart charger.
Batteries: low self-discharge NiMH 9V cells
The included batteries are NiMH 9V rechargeable cells, built for low self-discharge storage compared to typical NiMH use cases. That matters if you store spares for devices you do not use daily. Like most rechargeable 9V options, they are not a perfect substitute for fresh disposable cells when it comes to maximum shelf-life performance, but LSD design is specifically meant to reduce the “drift” over time.
Charging time and practical expectations
The charger’s listed behavior includes a charge time reference of up to about 5 hours, and reviews mention top-ups that happen quickly for routine recharge cycles. Actual results can vary based on how depleted a battery is, but the consistent feedback around “fully charges” suggests the TN141 is designed for everyday reliability rather than slow trickle charging.
Compatibility and device fit
This is a charger-and-9V-battery bundle intended for standard rectangular 9V NiMH rechargeable batteries. The included batteries are suitable for common 9V-powered household devices such as smoke alarms, clocks, cameras, radios, and toy or controller electronics (as reflected by typical 9V use cases). If your device requires a different battery chemistry or a different size, you will need a different setup.
Pros and cons at a glance
- Best for: households that regularly replace 9V batteries, want a compact USB-powered charger, and prefer LED feedback per charging bay.
- Who should buy: people keeping a small rotation for devices like smoke alarms, clocks, or other 9V electronics, especially when you recharge occasionally rather than constantly.
- Who should avoid: shoppers who need to charge more than two 9V batteries at once, or those who expect rechargeable 9V NiMH to match the run time and shelf-life behavior of brand-new disposable cells.
Verdict
The Tenergy TN141 is a solid, practical 9V rechargeable bundle if you want independent 2-bay charging, clear LED status indication, and a micro-USB-powered charger that fits an everyday routine. It is a good value choice when you are ready to swap from disposables to a rotation of rechargeable 9V batteries, with the main tradeoff being that rechargeables do not always deliver the same long-between-changes experience as fresh non-rechargeables.
Price and availability
Pricing and stock can change frequently. Use the link below to check the latest cost and availability for the TN141 bundle on Amazon.
FAQ
How many 9V batteries can the Tenergy TN141 charge at once?
It has two charging slots (2-bay design), so it can charge two 9V batteries simultaneously.
Does the charger have LED indicators?
Yes. Each charging channel has its own LED status lights to indicate charging, completed state, or incorrect insertion.
What power connection does the TN141 use?
The charger is powered using a micro-USB input, which can be convenient if you have a USB power source available.
Are the included 9V batteries low self-discharge?
Yes, the bundle includes Centura low self-discharge (LSD) 9V NiMH rechargeable batteries intended to better hold charge during storage compared to standard non-LSD rechargeable setups.
How long does it take to charge a 9V battery?
The charger is listed with an approximate charge time of up to about 5 hours, though real-world charging speed depends on how depleted each battery is.
Is this a good replacement for disposable 9V batteries?
It can be, especially for household devices you cycle through regularly. Just keep expectations realistic: rechargeable NiMH 9V batteries typically will not behave exactly like fresh disposable cells in terms of run time and shelf life.
Specifications
| Product Title | Tenergy TN141 2 Bay 9V Smart Charger with 4 pcs Centura Low Self-Discharge 9V NiMH Rechargeable Batteries |
|---|---|
| Category | Electronics > Household Batteries, Chargers & Accessories > Battery & Charger Sets |
| Brand | Tenergy |
| Manufacturer | Tenergy |
| Model Number | FBA_90260 |
| Color | White |
| Item Weight | 83 Grams |
| Product Dimensions | 0.63"D x 1.02"W x 1.89"H |
| Output Voltage | 9 Volts |
| Input Voltage | 11 Volts |
| Battery Charge Time | 5 Hours |
| Compatible Devices | Adapter, Camera, Clock, Controller, Led lights, Radio, Smoke Alarm, Toy |
| Connector Type Used on Cable | Micro USB |
| Number of Ports | 2 |
| Item Dimensions D x W x H | 0.63"D x 1.02"W x 1.89"H |
| Mfr Part Number | FBA_9VNIMH2B |
| UPC | 844949022156 |
| Warranty Description | 1 year |
| Unit Count | 1.0 Count |
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