18650 Battery Charger, 2 Bay Rechargeable Batteries Charger with Smart LCD Display
Quick take
This 2-bay USB-C battery charger is designed for 3.7V Li-ion cells (including many popular 18650-size variants) and also supports AA/AAA NiMH and NiCd. Its dual independent LCD aims to make it easier to monitor charge status, and it includes safety protections plus low-voltage activation for deeper-discharged cells.
Pros and cons
Pros
- Wide compatibility across many 3.7V Li-ion battery types and common AA/AAA NiMH/NiCd.
- Dual-slot, independent charging with an LCD display for at-a-glance monitoring (voltage, current, and charge percentage).
- USB-C input (5V DC), so you can charge from power banks, computers, or USB wall chargers.
- Safety protections include overcharge, over-discharge, short circuit, and reverse polarity protection.
Cons
- Its USB-C setup may be picky about cable/power source power levels for some users (limited report of USB-C working only with lower-power A-to-C usage patterns).
- Battery fit depends on length, with a stated supported range (29mm to 70mm).
- Limited long-term reliability evidence because reviews are mostly “works so far” style check-ins.
What buyers think
Buyer-review evidence is mixed but generally positive, with multiple shoppers reporting the charger works well for 18650-style cells in real devices (for example, older flashlights and rechargeable setups). Several reviews highlight that the charger is simple to use and that the batteries charge with noticeably improved endurance compared with charging inside certain flashlights. A few users mention small usability tradeoffs around how the USB-C connection behaves with different cable and charger combinations, but they still found the device functional overall. Some buyers also flag that the bigger question is long-term lifespan, since their testing window was relatively short.
Who this charger is for
- You want one charger for mixed battery types: 3.7V Li-ion cells and also AA/AAA NiMH/NiCd.
- You prefer monitoring without guesswork: the dual independent LCD displays key charging info at a glance.
- You need flexible power: USB-C input is meant to work with 5V/2A sources such as power banks, computers, and compatible USB wall or car chargers.
Compatibility and charging behavior
Supports many 3.7V Li-ion and AA/AAA chemistries
This charger is intended to work with common 3.7V Li-ion battery formats and variants such as 18650, 21700, 21750, 18700, 14500, 17650, 18350, 18500, and 26650 (among others listed). It also supports 1.2V AA and AAA NiMH/NiCd cells. The charger is designed to automatically identify the battery type and charge each bay independently.
Battery size matters (check length)
It supports batteries with a length range of 29mm to 70mm. If you’re using less common cell sizes or adapters, you’ll want to confirm your battery’s length falls inside that window so it can make proper contact.
Low-voltage activation
For lithium cells that have dropped to a lower voltage, this charger includes a low-voltage activation feature intended to help bring batteries back to a safe charging state.
Display, controls, and monitoring
The dual-slot independent LCD is meant to show high-definition charging status, including voltage, current, and battery capacity percentage. In day-to-day use, that’s useful if you have multiple batteries cycling through different devices and you want to avoid “charging until the light says something” guesswork.
Safety features you can rely on
The charger includes several protection features: overcharge protection, over-discharge protection, short-circuit protection, and reverse polarity protection. Those protections matter most for home use when chargers and batteries get swapped often, or when devices sit idle for a while and batteries vary in starting charge.
Pros and cons, in plain terms
Pros
- Versatile across battery chemistry, so it can reduce the number of chargers you own.
- Dual bay with independent LCD monitoring for clearer visibility into the charging progress of each slot.
- USB-C, 5V input makes it more convenient than chargers that only work with wall power.
Cons
- USB-C behavior may depend on your power source and cable, based on limited user notes.
- Compatibility is size dependent, pay attention to the stated 29mm to 70mm battery length range.
- Long-term durability proof is limited since several reviews are short-term “so far” impressions.
Price and availability
This model is typically positioned as a budget-friendly dual-bay smart charger, and availability can vary. If you’re deciding between value-focused options, check the current listing price and make sure your batteries fall within the supported chemistries and length range before buying.
Verdict
If you regularly use 18650-size (and similar) 3.7V Li-ion batteries and also have AA/AAA NiMH or NiCd cells, this 2-bay USB-C charger offers a convenient “one charger for many” approach with an LCD that helps you track charge progress. It’s a solid pick for everyday bench-top charging, flashlight batteries, and mixed household rechargeables, with the main caveats being USB power compatibility details and the need to verify battery length fit.
Make sure this is the right fit
- Check your batteries for 3.7V Li-ion chemistry (or AA/AAA NiMH/NiCd) and confirm the length is within 29mm to 70mm.
- Use a suitable 5V/2A power source for best performance (power banks, USB wall adapters, or computers).
- Plan for monitoring: if you prefer precise charge visibility, the LCD display is one of the bigger reasons to choose this model.
FAQ
Does this charger support both Li-ion 18650-style batteries and AA/AAA NiMH/NiCd?
Yes. It’s designed for many 3.7V Li-ion cells in the 18650 family (and related sizes listed), and it also supports AA and AAA 1.2V NiMH/NiCd batteries.
Is it compatible with 21700 and 26650 batteries?
Yes, the charger is listed as compatible with 21700/21750 and 26650 (as well as several other common 3.7V variants).
What power source does it use?
It uses USB-C input with 5V DC power (the charger is specified for USB power sources such as power banks, computers, and USB wall or car chargers).
Does it charge both bays at the same time?
It has two bays with independent charging and a dual independent LCD display so you can monitor each slot’s charging info.
What safety protections are included?
It includes overcharge protection, over-discharge protection, short-circuit protection, and reverse polarity protection.
How do I confirm battery fit?
Check that your battery length is between 29mm and 70mm, since that’s the stated supported range.
Is it good for low-voltage batteries?
Yes. It includes a low-voltage activation function intended to help start charging batteries that have dropped to low voltage.
Specifications
| Product Title | 18650 Battery Charger,2 Bay Rechargeable Batteries Charger with Smart LCD Display,Fast Charging for AA/AAA Ni-MH/Ni-Cd, 3.7V Li-ion Batteries IMR/INR/ICR 18650 21700 17500 14500 26650 21750 26650 |
|---|---|
| Category | Electronics > Household Batteries, Chargers & Accessories > Battery Chargers |
| Brand | WANGDAJIEDIAN |
| Manufacturer | Shenzhen Wonder Jiedian Technology Co.,Ltd |
| Model Number | EL-2 |
| Color | Black |
| Product Dimensions | 4.63"D x 1.5"W x 2.85"H |
| Output Voltage | 3.7 Volts (DC) |
| Input Voltage | 5 Volts (DC) |
| Current Rating | 2 Amps |
| Amperage | 2 |
| Compatible Devices | Mobile power banks, computers, car chargers, USB wall chargers, and other devices supporting USB charging |
| Connector Type Used on Cable | Type-C (USB-C) |
| Number of Ports | 2 |
| Item Dimensions D x W x H | 4.63"D x 1.5"W x 2.85"H |
| Warranty Description | 1 Year Manufacturer |
Available variants
Size
- Single Slot
- 2 Slot
- 4 Slot
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