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Das inoffizielle Android-SystemhandbuchDas inoffizielle Android-Systemhandbuch
Buy at Amazon for EUR 7,00
HUAWEI Y6 2019 Dual-SIM Smartphone 15,46 cm (6,09Zoll) (3020mAh Akku, 32 GB interner Speicher, Android 9.0) sapphire blueHUAWEI Y6 2019 Dual-SIM Smartphone 15,46 cm (6,09Zoll) (3020mAh Akku, 32 GB interner Speicher, Android 9.0) sapphire blue
Buy at Amazon for EUR 139,00
Xoro MegaPAD 1404 V2 35,56 cm (14 Zoll) Tablet-PC (QuadCore Cortex A17 1.8GHz, 2GB RAM, 16GB Flashspeicher, IPS 1920x1080, WLAN (2.4/5GHz), Bluetooth 4.0, Android 5.1, 12V DC ohne Akku) schwarzXoro MegaPAD 1404 V2 35,56 cm (14 Zoll) Tablet-PC (QuadCore Cortex A17 1.8GHz, 2GB RAM, 16GB Flashspeicher, IPS 1920x1080, WLAN (2.4/5GHz), Bluetooth 4.0, Android 5.1, 12V DC ohne Akku) schwarz
Buy at Amazon for EUR 238,87
Ulefone S1 Pro Dual SIM 4G Handy Günstig, 3000mAh Großer Akku, 5.5 Zoll Display Metallrahmen 16GB Speicher, Face ID, Android 8.1, 13MP + 5MP + 8MP Triple Kameras, GPS Bluetooth WLAN - SchwarzUlefone S1 Pro Dual SIM 4G Handy Günstig, 3000mAh Großer Akku, 5.5 Zoll Display Metallrahmen 16GB Speicher, Face ID, Android 8.1, 13MP + 5MP + 8MP Triple Kameras, GPS Bluetooth WLAN - Schwarz
Buy at Amazon for EUR 79,99
Cubot Kingkong Outdoor Smartphone ohne Vertrag IP68 Wasserdicht, Stoßfest und Staubdicht 5 Zoll Display Android 7 Dual SIM Handy 4400 mAh Akku, GPS+Kompass, 2GB+16GB, WiFi, Bluetooth, SchwarzCubot Kingkong Outdoor Smartphone ohne Vertrag IP68 Wasserdicht, Stoßfest und Staubdicht 5 Zoll Display Android 7 Dual SIM Handy 4400 mAh Akku, GPS+Kompass, 2GB+16GB, WiFi, Bluetooth, Schwarz
Buy at Amazon for EUR 119,99
Cyrus CS24 WORK Outdoor Smartphone, 5000 mAH Akku, Android 7.0 Nougat, 5 Zoll, 16 GB, Dual SIM, 13 MP Kamera, stoßfest, staubdicht, wasserdicht, schwarzCyrus CS24 WORK Outdoor Smartphone, 5000 mAH Akku, Android 7.0 Nougat, 5 Zoll, 16 GB, Dual SIM, 13 MP Kamera, stoßfest, staubdicht, wasserdicht, schwarz
Buy at Amazon for EUR 217,90
Ulefone Armor X2 Android 8.1 5500mAh Akku Outdoor Handy, Dual SIM Robuste Smartphone 5.5 Zoll 2GB 16GB 13MP+5MP+8MP Kamera IP68 Wasserdicht Stoßfest Staubdicht, Seite Fingerabdruck NFC, RosegoldUlefone Armor X2 Android 8.1 5500mAh Akku Outdoor Handy, Dual SIM Robuste Smartphone 5.5 Zoll 2GB 16GB 13MP+5MP+8MP Kamera IP68 Wasserdicht Stoßfest Staubdicht, Seite Fingerabdruck NFC, Rosegold
Buy at Amazon for EUR 119,99
As of 2019-04-25 10:55
prices & availability might be subject to change.
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Battery Helpers

Battery Calibration

2019-04-05

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

2019-04-05

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

2019-04-05

Further Readings:

2019-04-08