[Gta04-owner] GTA04A5 charging?

H. Nikolaus Schaller hns at goldelico.com
Mon Jul 10 21:22:08 CEST 2017


> Am 10.07.2017 um 21:18 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
> 
> Hi Martin,
> 
>> Am 10.07.2017 um 21:06 schrieb Martin Rottensteiner <martin.rottensteiner.list at gmail.com>:
>> 
>> Hi,
>> 
>> I just got it in the mean time that the phone really starts on itself after plugging charger and cable (I have to wait some minutes).
>> Then I get the boot screen where I can choose the partition where to boot the system from.
> 
> Press "OFF" here as quickly as possible. It will turn off the GTA04 - but will continue trickle charging even if voltage becomes higher.

In other words: it will not attempt to boot again even if the battery becomes fuller and fuller.
This auto-poweron happens only when voltage rises above ca. 3.2V.

> 
> After a while the battery should have become full enough to boot Linux until it enables full charging to get to 100%.

Just press the power button after some hour.

> 
>> From this point on I wait about 15 sec, then the screen turns off and power button turns from red to off.
> 
> Looks like empty battery (<3.2V). It charges in trickle charge mode (~100mA) until the GTA04 turns on. Then, U-Boot and Display and Linux etc.
> draw ca. 400mA which is more than trickle charging supplies. Therefore the battery starts discharging which holds approx. 15 seconds you see.
> If Linux boots fast enough it would enable 500mA charging. If not, the battery is drained to the auto-power-off point.
> 
>> There is no difference if I just wait at the boot screen or try to boot debian lxde or latest replicant (sms hack).
>> 
>> It looks for me that the battery is not fully charged and I don't know how to charge it. 
>> 
>> Please help :)
> 
> Please let us know if that helps,
> Nikolaus
> 
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