Tenergy TN141 Smart Charger for NiMH 9V Rechargeable Batteries
Quick take
The Tenergy TN141 is a compact smart charger built specifically for NiMH 9V rechargeable batteries, with two independent charging slots so you can charge one or two cells. It’s powered by micro USB, and each bay has its own LED indicator (red while charging, green when fully charged). The main caveat is that it is designed for NiMH 9V batteries, so it will not be the right fit for other 9V chemistries.
Pros and cons
Pros
- Two independent 9V charging channels with separate LED status lights for each battery.
- Smart charging behavior indicated by red (charging) to green (fully charged) transitions.
- Micro USB power option for recharging anywhere you have a USB port.
- Compact size (about 83 g) for easy storage.
Cons
- Limited compatibility: intended for NiMH 9V rechargeable batteries.
- Status lights are easy to miss when batteries are inserted, since the LEDs are positioned near the bottom of the unit.
- Charge time is not “instant” (officially listed around hours rather than minutes).
What buyers think
Buyer-review evidence is broadly consistent that the TN141 is straightforward to use and does the job for everyday 9V recharging needs. Many comments emphasize that the charger powers up reliably, the red-to-green LED behavior is clear enough for basic status awareness, and it performs well for devices that run on 9V rechargeable batteries (including equipment like metal detectors and other recurring-use electronics). There is also some practical feedback that the LED indicators are located low on the unit, so it may take a quick bend or glance to see the light color while batteries are installed.
Key features that matter for real-world use
Dual slots with independent status
With two separate charging channels, you can charge one battery or both without needing to keep them paired. Each bay uses its own LED indicator, so you can tell the state of each battery individually (charging versus fully charged).
Micro USB convenience
The TN141 can be powered using a micro USB connection. That matters if you want a charger that works not just at a fixed outlet, but also in setups where you have USB power available. It’s also a practical choice for compact storage compared to bulkier plug chargers.
Charging time expectations
For planning purposes, the charger’s listed charge time is measured in hours (around 5 hours in the technical listing). Reviews also suggest it can take time to fully top off, which is typical for 9V NiMH smart charging. If you expect rapid turnarounds like you might get from some specialty quick chargers, you may want to manage expectations.
Who this charger is best for
- NiMH 9V rechargeable battery users who want a dedicated charger for 9V cells.
- People charging one device’s battery at a time who appreciate independent slots and per-bay status lights.
- Buyers who value compact, USB-powered convenience for home storage, workshop use, or travel-style setups.
Who should avoid it
- If your 9V rechargeables are not NiMH, this charger may not be compatible. Double-check your battery chemistry before buying.
- If you need extremely fast charging, the listed hours-long charge time may not fit your workflow.
- If you prefer fully visible status indicators from a quick glance at the top, you may find the LED placement slightly inconvenient once batteries are inserted.
Verdict
The Tenergy TN141 is a solid, simple choice if you use NiMH 9V rechargeable batteries and want a small charger that can handle one or two cells with clear charging state signals. Its biggest limitations are chemistry compatibility and the practical reality that charging takes hours, not minutes. If those fit your needs, it’s an easy-to-recommend option for keeping 9V devices running.
Price and availability
Pricing can vary by retailer and time. Check the latest cost and stock status before you order using the link below.
FAQ
Is the Tenergy TN141 compatible with all 9V rechargeable batteries?
It is designed for NiMH 9V rechargeable batteries. If your 9V rechargeables use a different chemistry, compatibility may not be guaranteed, so confirm your battery type first.
Can it charge one battery or only two?
It has two independent charging channels, so you can charge one or two 9V batteries, depending on what you need.
How do the LED indicators work?
Each slot uses an LED indicator: red indicates charging, and green indicates the battery is fully charged.
Does it require a wall outlet?
No. It can be powered using a micro USB connection, which is useful if you have USB power available.
How long does it take to charge?
The technical listing places charge time on the order of hours (about 5 hours). Actual results can vary based on battery condition and how much charging is needed.
Specifications
| Product Title | Tenergy TN141 Smart Charger for NiMH 9V Rechargeable Batteries, 9V Cells Battery Charger, 9 Volt NiMH |
|---|---|
| Category | Electronics > Household Batteries, Chargers & Accessories > Battery Chargers |
| Brand | Tenergy |
| Manufacturer | Tenergy |
| Model Number | TN141 |
| Color | Green,Red |
| Item Weight | 83 Grams |
| Product Dimensions | 6.9"D x 5.4"W x 1.5"H |
| Output Voltage | 9 Volts |
| Input Voltage | 100 Volts |
| Battery Charge Time | 5 Hours |
| Current Rating | 100 Milliamps |
| Amperage | 100 Milliamps |
| Connector Type Used on Cable | USB |
| Number of Ports | 2 |
| Item Dimensions D x W x H | 6.9"D x 5.4"W x 1.5"H |
| Specification Met | UL, CE, FCC |
| Mfr Part Number | TN141 |
| UPC | 844949030045 |
| Warranty Description | Tenergy 1 Year |
| Unit Count | 1.0 Count |
Available variants
Size
- Charger Only
- Charger + 4 Pack 9Vs
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