18650 Battery Charger, Suitable for Lithium Battery 18650 20700 10440 14500 18500 16340 17500
Quick take
This is a USB micro-connector, single-slot charger built for 3.7V lithium-ion cells, covering popular sizes like 10440, 14500, 16340, 17500, 18500, and 18650. Buyers tend to like how easy it is to tell charge status with a red (charging) to green (full) indicator. The key limitation is it charges one battery at a time, and it is not meant for Ni-MH, Ni-Cd, or AA/AAA cells.
Pros and cons
Pros
- Works with many 3.7V Li-ion sizes (including 18650, 18500, 16340, 14500, 10440).
- Clear charging indicator, red while charging and green when full.
- Includes multiple protection features such as overcharge, over-discharge, short circuit, temperature control, and reverse polarity protection.
- USB micro-compatible input (fits power bank, laptop USB, or a car USB charger).
Cons
- Single-slot design means you will charge batteries one at a time.
- Only compatible with 3.7V lithium-ion batteries, not Ni-MH, Ni-Cd, or AA/AAA.
- Maximum charge current is listed as 600mA per slot, so it is not positioned as a high-speed charger.
What buyers think
Buyer-review evidence is fairly consistent around the charger doing what it is supposed to do, with reliable status feedback. Multiple reviews mention the red-to-green indicator being helpful for knowing when charging is complete, and they also describe the charger as compact and straightforward to use. Reports of problems are limited in the available snippets, so patterns around speed, long-term durability, or build quality are hard to confirm from this limited set of comments.
How it fits 18650 owners and other 3.7V Li-ion setups
If your routine involves 3.7V lithium-ion cells for flashlights, small electronics, or DIY projects, this charger targets that exact lane. It is designed to charge several common Li-ion sizes, including 18650, 18500, 17335, 17500, and 16340, as well as smaller form factors like 10440 and 14500. That makes it a practical “one charger for multiple sizes” option, as long as your batteries match the 3.7V lithium-ion chemistry.
Compatibility and what to avoid
It is not for Ni-MH, Ni-Cd, or AA/AAA batteries, and it is not meant for other chemistries. Before you buy, double-check the battery label. Look for a 3.7V Li-ion designation and confirm the physical size matches one of the supported formats. If you have mixed battery types (for example, AA/AAA plus 18650), you may need a separate charger for the non-Li-ion cells.
Charging performance and controls
This is a single-slot charger with a listed maximum current of 600mA when charging a 3.7V battery. In practical terms, that usually means reliable, steady charging, but not the fastest turnaround if you are trying to cycle multiple cells quickly. The setup is simple: insert the battery with correct contact alignment.
Indicator you can actually use
A key quality-of-life feature is the two-color status light. The charger uses red to indicate charging and green to indicate a full charge. Several buyers call out this behavior as an improvement over older chargers that did not make it obvious when charging was finished.
Safety and protection features
The charger includes protection mechanisms intended to reduce common charging risks, including overcharge protection, over-discharge protection, short-circuit protection, intelligent temperature control protection, and battery reverse polarity protection. It is also built with fire prevention PC+ABS material, which is aimed at improving heat resistance and durability.
Design, portability, and everyday usability
As a compact, single-slot option, it is easier to pack than multi-bay chargers. It uses a micro-USB input, so you are not locked into wall power. The practical benefit is flexibility, especially if you already keep a power bank, laptop USB port, or car USB charger handy.
Pros and cons summary
Buy it if: you want a simple USB charger for 3.7V lithium-ion batteries across multiple common sizes (including 18650 and 18500), and you do not mind charging one battery at a time.
Avoid it if: you need AA/AAA or Ni-MH/Ni-Cd charging, or you want a multi-slot charger for batch charging multiple cells quickly.
Price and availability
Pricing and stock can change frequently. Check the latest listing for the most current cost and shipping details.
FAQ
Is this charger compatible with AA or AAA batteries?
No. It is intended for 3.7V lithium-ion cells and is not suitable for Ni-MH, Ni-Cd, or AA/AAA batteries.
Can it charge an 18650 battery?
Yes. It is designed to charge 3.7V lithium-ion batteries including 18650.
What do the light colors mean?
The indicator is red while charging and green when the battery is fully charged.
How many batteries can it charge at once?
It is a single-slot charger, so it charges one battery at a time.
What power source does it use?
It uses a micro-USB input, so it can be powered by common USB sources such as a laptop USB port, power bank, or a car USB charger.
What is the maximum charging current?
The listed maximum charging current is 600mA per slot for 3.7V lithium-ion batteries.
Does it include charging safety protections?
Yes. It includes protection features such as overcharge, over-discharge, short circuit protection, intelligent temperature control, and reverse polarity protection.
Specifications
| Product Title | 18650 Battery Charger, Suitable for Lithium Battery 18650 20700 10440 14500 18500 16340 17500 Battery Charger, USB Single Slot li-ion Rechargeable Battery Charger (Battery not Included) |
|---|---|
| Category | Electronics > Household Batteries, Chargers & Accessories > Battery Chargers |
| Brand | WANGDAJIEDIAN |
| Manufacturer | WANGDAJIEDIAN |
| Color | Black |
| Product Dimensions | 4.17"D x 1.22"W x 1.41"H |
| Output Voltage | 3.7 Volts |
| Input Voltage | 5 Volts |
| Current Rating | 0.6 Amps |
| Amperage | 0.6 Amps |
| Compatible Devices | Devices with Micro-USB port |
| Connector Type Used on Cable | Micro-USB |
| Number of Ports | 1 |
| Item Dimensions D x W x H | 4.17"D x 1.22"W x 1.41"H |
| Specification Met | FCC |
| Mfr Part Number | WD-BC-001 |
| UPC | 705888914066 |
| Warranty Description | 1 year |
| Unit Count | 1.0 Count |
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