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more electronics than electrics - battery and charging question

psychicwarrior
this pic --> https://drive.google.com/file/d/1gunP4gFyIucj0ITstccf2D2szu3cw17O/view


is of parts of a radio that has a compartment for a rechargeable battery. 


From the pic and the pin voltages I measured (measurements not accurate I'm sure), is it possible to 'suggest' how the battery was wired/connected to the pins ?


It is a Genus Type-R DAB radio from yesteryear and the manufacturer no longer exists and getting hold of tech diagrams or info from other sources has proved fruitless.  The base plate states 7.2V battery pack.


Some companies have suggested they can put together a battery unit for me to fit, but they need to know how the leads need to be connected from the battery to the internal charging connector (4 pins)  and I cannot get from anywhere a manual, or a picture etc.


If it is possible to work out from the above picture etc, please let me know though I doubt without the manufacturer info it is likely possible (from what I've been told so far).  Additionally, I tried contacting one person who I found selling the radio, but they too had no battery to send a pic of.


Regards

Habs
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  • 0
    7.2V is awkward, it  could be 2 Lithium cells, or 6 NiMh. It seems it was made around 2007, so very much it could be either. The two battery types have vary different charging requirements to be observed  if not to create a bonfire,

    Of the two Ni Mh are more forgiving. 8.9v open circuit is rather high for lion, but it depends how it fast that droops with taking some current (can you put a k ohm accross and re-measure?)

    There are really 3 wires, I suspect the 0V and 8.9V with the thicker tracks are the battery proper, and there is some sort of either thermometer sensor for a Nimh pack or charge balancer for the mid point of 2 lions.


    I might put power in on 1 and 4, from a bundle of cheap NiMh and consider to take the batteries out to recharge them outside the box. Various holders are available for AA cells.

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  • 0
    7.2V is awkward, it  could be 2 Lithium cells, or 6 NiMh. It seems it was made around 2007, so very much it could be either. The two battery types have vary different charging requirements to be observed  if not to create a bonfire,

    Of the two Ni Mh are more forgiving. 8.9v open circuit is rather high for lion, but it depends how it fast that droops with taking some current (can you put a k ohm accross and re-measure?)

    There are really 3 wires, I suspect the 0V and 8.9V with the thicker tracks are the battery proper, and there is some sort of either thermometer sensor for a Nimh pack or charge balancer for the mid point of 2 lions.


    I might put power in on 1 and 4, from a bundle of cheap NiMh and consider to take the batteries out to recharge them outside the box. Various holders are available for AA cells.

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