Thorgeon Li-ion rechargeable battery 18650 3400mAh 3.7V – USB-rechargeable, 1 pc
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The Thorgeon Li-ion battery is a rechargeable battery solution with a built-in Micro-USB charging port. You do not need a separate charger — you can charge the battery directly with a standard USB to Micro-USB cable (USB-C/Lightning charger with a suitable cable, power bank, computer, or phone wall charger). A capacity of 3400 mAh and a voltage of 3.7 V make this a versatile option for devices that require a Li-ion battery.
Li-ion battery, 18650 size (18 × 70 mm). 3.7 V voltage. Built-in Micro-USB charging port. Operating temperature −20–50 °C.
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Technical specifications
- Product type: Li-ion rechargeable battery (built-in USB charging)
- Brand: Thorgeon
- Type: Lithium-ion
- Capacity: 3400 mAh
- Nominal voltage: 3.7 V
- Size standard: 18650 (standard Li-ion size)
- Diameter: 18 mm
- Length: 70 mm
- Height with terminal: 70 mm
- Weight: 49.8 g
- Charging port: Micro-USB (built-in)
- Suitable for fast charger: yes
- Built-in circuit board: yes (protects against overcharging and overcurrent)
- Plastic casing: yes
- Operating temperature: −20–50 °C
- Number of cells: 1
- Product code (EAN): 4751029894120
Compatibility and use
Important about size — this is NOT an AAA battery
Although manufacturer data may mention "Micro/AAA" rating, the dimensions indicate this is an 18650-size Li-ion battery — not a traditional AAA alkaline battery. Differences:
- AAA alkaline battery: diameter 10.5 mm, length 44.5 mm, voltage 1.5 V
- 18650 Li-ion (this one): diameter 18 mm, length 70 mm, voltage 3.7 V
The voltage of this battery (3.7 V) is more than double that of an AAA. Do not install in an AAA device — it can damage the device. Verify that your device is specifically designed for an 18650-size Li-ion battery.
Typical applications
- LED flashlights (common size)
- Electric bicycle auxiliary batteries
- Device-specific Li-ion batteries
- Solar-powered lights
- DIY electronics projects
USB charging
There is a Micro-USB port at the end of the battery for connecting a standard Micro-USB cable. Charge the battery fully before the first use. Charging can take 2–6 hours depending on capacity and power source. The battery contains a circuit board that protects against overcharging — you can leave the charger connected, but for better storage life, disconnect it after a full charge.
Safety
- Do not short-circuit the terminals — use a casing similar to the original
- Do not expose to temperatures above 60 °C
- Take the retired battery to a recycling point — do not dispose of in mixed waste
- Do not charge a mechanically damaged battery
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Delivery
We ship your order from our warehouse in Jyväskylä. Orders placed before 2 PM are usually shipped on the same day. Free delivery within Finland for orders over €150.
Warranty
Products purchased through Lumenled come with a manufacturer's warranty, supported by Lumenled in cooperation with the importer. You can find detailed warranty terms here: Warranty terms of our partners.