Battery charger Lithium with protection 3.7V T6845-C Module

Description

T6845-C 3.7V Lithium Battery Charger & 5V Boost Module with Protection

This versatile T6845-C module combines everything you need to charge a single-cell (3.7V) Li-ion/LiPo battery and use it to power 5V devices. It integrates a charger, battery protection circuitry, and a step-up (boost) converter into one compact board. Ideal for DIY power banks, portable projects, and battery-powering 5V microcontrollers or sensors.

Key Features:

• All-in-One Solution: Charges, protects, and provides 5V output from a 3.7V Li-ion/LiPo battery.

• Convenient Charging: Uses a standard Micro USB input port for charging (5V input).

• Stable 5V Output: Boosts battery voltage to provide up to 1A at 5V via a standard USB-A output port.

• Integrated Battery Protection: Includes over-charge (4.2V cutoff), over-discharge (2.9V cutoff), and likely over-current protection for safe operation.

• Status LEDs: Indicate charging and fully charged status.

• High Efficiency: Good discharge efficiency (~85%) for longer battery life.

• Low Standby Current: Minimal battery drain when idle (~8µA).

Specifications:

• Module Type: Li-ion/LiPo Charger + Protection + 5V Boost Converter

• Charging Input Voltage: 4.5V – 5.5V (via Micro USB Port)

• Max Charging Current: 1A

• Charge Cut-off Voltage: 4.2V ±1%

• Battery Over-discharge Protection Voltage: 2.9V

• Output Voltage: 5V (via USB-A Port)

• Max Output Current: 1A

• Quiescent Current: Approx. 8µA

• Discharge Efficiency: Approx. 85% (at 3.7V input, 5V/1A output)

Connections:

• Micro USB: For charging input power (5V).

• USB-A: For 5V output power.

• B+ / B-: Solder pads for connecting the 3.7V battery.

Note: Ensure correct battery polarity when connecting to B+ and B-. Do not short circuit the output.