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+--- Thread: Power Google Nexus 4 mobile phone with an external 18650 battery (/Thread-Power-Google-Nexus-4-mobile-phone-with-an-external-18650-battery)
Power Google Nexus 4 mobile phone with an external 18650 battery - RustyOx - 07-07-2022
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I have a Google Nexus 4 connected to a raspberry pi (as home automation server) all the time. The battery expended ( get bigger ) with gas inside like a balloon, so I decided to replace the battery with Sony 18650 battery which taken out from my original battery pack of the Trek BionX ebike.
Initially, I only connected two power pin, the phone doesn't power up. I guess the middle pin not connected is thermistor which may needed for power up check. The resistance between the middle pin and ground is measured about 62k, so I connected a 68k resister between middle pin and ground, and it works.
The battery is LG BL-T5 2100mAh.
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RE: Power Google Nexus 4 mobile phone with an external 18650 battery - RustyOx - 26-07-2022
Found one issue, as long as the phone finished the apps optimization, it reboots.
I guess the Android OS failed to communicate to the battery to find out the battery capacity etc., And issue reboot command.