Battery Power Indicator - 6V Lead-acid Battery Charge Level Indicator Voltmeter

• This is a Li-ion Battery Charging board with Over-charging and over-discharge protection. The board is based on 1 x BM3451 + 4 x LR8726 chip-set.

• It can charge 5 li-ion cells and is not balanced. The BM3451 is a professional protection IC for 3/4/5 cells rechargeable battery pack; it is highly integrated, and generally used in power tools, electric bicycles and UPS applications.

• The BM3451 works constantly to monitor each cell’s voltage, the current of charge or discharge, and the temperature of the environment to provide overcharge, over-discharge, discharge overcurrent, short circuit, charge overcurrent and over-temperature protection, etc. Besides, it also can change the protection delay time of overcharge, over-discharge and discharge overcurrent by setting the external capacitors.

• The BM3451 provides external bleeding for the cell-capacity balance function to avoid unbalanced capacity between each cell. Thus, the batteries can work for longer.

Specification:

• Working Current: 5 - 15mA (The Lower the battery voltage lesser the current)

• Eight step Resolution: 10% 25% 40% 50% 60% 75% 90% 100%

• Voltmeter Accuracy: 1%

• Working Temperature: -10 - +65 degree Centigrade, Operating Humidity: 10 - 80%

• If the indicator is used with batteries other than lead-acid, it will display only voltage reading.