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Das inoffizielle Android-SystemhandbuchDas inoffizielle Android-Systemhandbuch
Buy at Amazon for €5.11
Armor X5, redArmor X5, red
Buy at Amazon for €139.99
Blackview BV5900 (2019) IP69K Outdoor Mobile Phone Without Contract 5.7 Inch HD+ Waterdrop Display Android 9.0 13MP+5MP Cameras 5580mAh Battery Helio A22 3GB+32GB 4G Robust SmartphoneBlackview BV5900 (2019) IP69K Outdoor Mobile Phone Without Contract 5.7 Inch HD+ Waterdrop Display Android 9.0 13MP+5MP Cameras 5580mAh Battery Helio A22 3GB+32GB 4G Robust Smartphone
Buy at Amazon for €149.99
Armor X3Armor X3
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XINSL Power Bank External Battery - 26,800 mAh High-Capacity Portable Charger with 2 LED Lights and 3 Output Ports - Lightweight Universal Charger, Compatible with iOS and Android Mobile Phone and TabletXINSL Power Bank External Battery - 26,800 mAh High-Capacity Portable Charger with 2 LED Lights and 3 Output Ports - Lightweight Universal Charger, Compatible with iOS and Android Mobile Phone and Tablet
Buy at Amazon for €25.99
UMIDIGI F2 Android 10 Smartphone without contract 6.53 Inch FHD FullView Display 6GB RAM 128GB ROM 5150mAh Large Battery Side Fingerprint SensorUMIDIGI F2 Android 10 Smartphone without contract 6.53 Inch FHD FullView Display 6GB RAM 128GB ROM 5150mAh Large Battery Side Fingerprint Sensor
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Blackview BV9100 (2019) Outdoor Mobile Phone Without Contract 13000mAh Battery (60 Day Standby) 6.3 inch FHD + IP68 Smartphone Android 9.0, Octa Core 4GB +64GB, 30W Fast Charge, 16MP + 16MP NFC OTG GreyBlackview BV9100 (2019) Outdoor Mobile Phone Without Contract 13000mAh Battery (60 Day Standby) 6.3 inch FHD + IP68 Smartphone Android 9.0, Octa Core 4GB +64GB, 30W Fast Charge, 16MP + 16MP NFC OTG Grey
Buy at Amazon for €269.99
As of 2020-03-31 01:18
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Battery Helpers

Battery Calibration

2020-03-20

Probably one of the most persistent Battery Myths: the battery needs to be calibrated every now and then! Rather nonsense (see linked article). You don't need an app to calibrate your device's battery. That rather happens as a side-effect: that is, always when your battery ran low until the evening, and you fully charged it in one uninterrupted run (over night) – so those apps are mostly „snake oil“ to obtain ad revenue (see: What’s it all about those modules apps contain?). But for those who insist, there are some calibration apps available – which all require root (mostly to remove the batterystats.bin which holds the "juice consumed by app" data):

Identify Battery Consumers

2020-03-20

Though Android comes with a built-in tool to show battery usage and consumers, this is often mis-interpreted and not even complete. It gives you raw indicators, true – and if there's an app nibbling at your battery all day long permanently with „greater hunger“, it will certainly show up here. For a deeper analysis, however, one often needs tools revealing more details:

Other Battery Helpers

2020-03-20

Further Readings:

2020-03-31