query: Blocking current from Backup battery (3x1.5V=4.5V) when powerbank (5V) is turned on my timer switch
positive_passages.docid: 156077
positive_passages.text: how to switch to backup battery when power fail?
negative_passages.docid: 146907
negative_passages.text: How can I avoid the battery charging when connected via USB?
negative_passages.docid: 50408
negative_passages.text: C# .NET: How to check if we're running on battery?
negative_passages.docid: 121865
negative_passages.text: BJT in Reverse Active Mode of Operation
negative_passages.docid: 108443
negative_passages.text: BJT as a switch: what am I doing wrong?
negative_passages.docid: 34266
negative_passages.text: MacBook Pro battery drains when connected to AC power
negative_passages.docid: 80503
negative_passages.text: Holding voltage high, for monostable 555 timer pulse
negative_passages.docid: 10649
negative_passages.text: Adding mAh when wiring battery cells in series?
negative_passages.docid: 84680
negative_passages.text: Will a battery short out when the terminals are directly connected together or will internal resistance save it?
negative_passages.docid: 24473
negative_passages.text: How to disable battery charging?
negative_passages.docid: 18656
negative_passages.text: Why doesn't connecting a positive terminal of a battery to ground cause current?
negative_passages.docid: 95875
negative_passages.text: Why does DMM show AC and DC current when source is a battery? (How to calculate power in this case?)
negative_passages.docid: 14714
negative_passages.text: How do I protect my laptop from power surges?
negative_passages.docid: 32052
negative_passages.text: how to reduce DC voltage using resistors?
negative_passages.docid: 133553
negative_passages.text: Calibrating/Correctly draining an Extended Battery
negative_passages.docid: 118923
negative_passages.text: Warning when battery is fully charged
negative_passages.docid: 93985
negative_passages.text: Control 5v relay through 3.3v GPIO using NPN transistor