4-Slot Independent Charger for 3.7V Li-ion Batteries

U5B Li-ion Charger

Dlyfull's 4-slot USB charger features independent channels, smart 3-stage charging, and Type-C input. With dual-color LED indicators and auto current adaptation, it delivers safe multi-battery charging:
1. 4-slot charger for 3.7V Li-ion batteries
2. Supports over 12 battery sizes (10340–26650)
3. Independent channels with auto cut-off
4. Smart TC-CC-CV charging
5. Low-voltage and 0V activation (for protected batteries)
6. Bad battery identification (<1.95V)
7. Intelligent input power adaptation
8. Red/Green LED with flashing alarm indication

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Application Scenarios

Specification

Model NameU5B
InputDC 5V/2A 
Output

DC 4.20V ± 0.05V : 1000mA*2 ±10%; 500mA*3; 500mA*4 ±10% (adaptive, max ≤ 1A per slot)

chargeable batteries

3.7V Li-ion: 10340, 17335, 17500, 17670, 18350, 18500, 18650, 18700, 20700, 21700, 26650

Functions

• Precise PWM-controlled three-stage (TC-CC-VC) charging
• Independent charging channels
• Automatic current adaptation (when input power is insufficient)
• 0V activation (for batteries with protection board)
• Low-voltage activation
• Bad battery identification (<1.95V ± 0.2V)
• Red/Green dual-color LED status & alarm indication

Smart Protections

• Over-voltage protection (Max. voltage)
• Short-circuit protection
• Reverse-polarity protection
• Over-charge auto cut-off
• Damp heat, vibration, and drop test passed


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