LG G3 (D855) power supply instead of battery - GSM-Forum

Jane1 · 06-13-2017, 09:19

Does anyone know how to connect pins on the G3 mainboard when I want to use a power supply instead of battery?

My problem is that the battery has 4 pins ( +,?,-,?). The first positive voltage , next unknown function for me, next is negative voltage and the last is unknown function for me.
I connected positive voltage ( +) from a power supply to the mainboard + pin( exactly the same where the battery has the + pin.) Also connected negative voltage from power supply to negative pin on the mainboard.

But G3 dos not start.
So I would guess I need to connect somehow other pins on the mainboard with power supply
Does anyone know how?
Thanks

ride_bmx_mhell · 01-26-2018, 13:07

pin1 positive (+) <-- when full 4.2v

pin2 ? (3v~3.3v) <-- measured on my tester,,this pin tell the phone it has a battery

pin3 (-) <-- ground

pin4 (bsi) <-- this pin determines the status of cells voltage capacity

,,you can power up by supplying pin1,2,3 but afterwards phone will shutdown (invalid battery) ,,pin4(bsi) must have correct voltage

LEENO · 07-10-2018, 12:33

Quote:

Originally Posted by ride_bmx_mhell

pin1 positive (+) <-- when full 4.2v

pin2 ? (3v~3.3v) <-- measured on my tester,,this pin tell the phone it has a battery

pin3 (-) <-- ground

pin4 (bsi) <-- this pin determines the status of cells voltage capacity

,,you can power up by supplying pin1,2,3 but afterwards phone will shutdown (invalid battery) ,,pin4(bsi) must have correct voltage

wich voltage should have bsi?

Jane1 · 07-20-2018, 09:33

try to connect resistor 60k between pin 2(BSI) and ground(pin 3)

06-13-2017, 09:19	#1 (permalink)
Jane1 No Life Poster Join Date: Jan 2010 Posts: 755 Member: 1212133 Status: Offline Thanks Meter: 58	LG G3 (D855) power supply instead of battery Does anyone know how to connect pins on the G3 mainboard when I want to use a power supply instead of battery? My problem is that the battery has 4 pins ( +,?,-,?). The first positive voltage , next unknown function for me, next is negative voltage and the last is unknown function for me. I connected positive voltage ( +) from a power supply to the mainboard + pin( exactly the same where the battery has the + pin.) Also connected negative voltage from power supply to negative pin on the mainboard. But G3 dos not start. So I would guess I need to connect somehow other pins on the mainboard with power supply Does anyone know how? Thanks

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01-26-2018, 13:07	#2 (permalink)
ride_bmx_mhell Junior Member Join Date: Oct 2016 Posts: 5 Member: 2640470 Status: Offline Thanks Meter: 3	pin1 positive (+) <-- when full 4.2v pin2 ? (3v~3.3v) <-- measured on my tester,,this pin tell the phone it has a battery pin3 (-) <-- ground pin4 (bsi) <-- this pin determines the status of cells voltage capacity ,,you can power up by supplying pin1,2,3 but afterwards phone will shutdown (invalid battery) ,,pin4(bsi) must have correct voltage

07-20-2018, 09:33	#4 (permalink)
Jane1 No Life Poster Join Date: Jan 2010 Posts: 755 Member: 1212133 Status: Offline Thanks Meter: 58	try to connect resistor 60k between pin 2(BSI) and ground(pin 3)