Motorola 800/850 series

[RadioTechnick]

Hi all.
I`m sorry for my english, i`m not from english-spoken country.

I need schematic or other info to bult home-made charger for my mtp850.
Charger have 3 pins: gnd, ext_bat+ and bat_fdbk (battery feedback?).
Without connecting bat_fdbk mtp850 found a charger (which represents a laboratory power supply) but after 3-5 minutes got an error "unknown charger".

Inside battery photo may be usefull too.


And may be somebody have a last CPS, because R6C.604.01 got an error while reading my mtp850 (application does not support codeplug version (7084 for H60PCN...)?

[Motorola]

Hi all.
I`m sorry for my english, i`m not from english-spoken country.

I need schematic or other info to bult home-made charger for my mtp850.
Charger have 3 pins: gnd, ext_bat+ and bat_fdbk (battery feedback?).
Without connecting bat_fdbk mtp850 found a charger (which represents a laboratory power supply) but after 3-5 minutes got an error "unknown charger".

Inside battery photo may be usefull too.


And may be somebody have a last CPS, because R6C.604.01 got an error while reading my mtp850 (application does not support codeplug version (7084 for H60PCN...)?


You cannot make charger, Motorola chargers have firmware inside and radio tries to read info from charger, if it does not get info you get "UNKNOWN CHARGER" error

regards