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The Universal USB Dual Slot Smart Lithium Battery Charger recharges 18650, 21700, and 26650 cells using a 5V 2A Micro-USB input. Two independent bays manage different battery sizes and capacities simultaneously without interfering with the power cycle. LED indicators switch from red to green once the 4.2V 1A output fills the connected lithium-ion batteries.
Key Features
- Dual Independent Slots: Supports simultaneous charging for two separate 18650 or 26650 lithium cells. Charge different capacities without damaging the batteries.
- Intelligent Overcharge Protection: Monitors voltage to stop power flow once cells reach 4.2V. Prevents cell swelling during extended charging sessions.
- Universal USB Power Input: Utilizes a standard DC 5V 2A Micro-USB interface for power. Connects to phone adapters or power banks easily.
- ABS Construction: Uses heat-resistant ABS plastic for the external 120x64x35 mm frame. Resists warping under high ambient humidity or heat.
Frequently Asked Questions
How long to charge 18650 battery with USB charger?
A 3000mAh 18650 battery takes approximately 3 to 4 hours to reach full capacity. The 1A output per slot determines this charging duration.
Is it safe to leave 18650 batteries in charger?
Integrated overcharge protection cuts current when the battery reaches 4.2V. Leaving cells overnight won't cause immediate damage or overheating.
