Post by Janne on Apr 27, 2009 22:31:41 GMT
Hi, I just finished a little mod where I used one old aftermarket battery (for CX65)
and the protection circuit from Original spare SXG75 battery.
What I wanted to do, was charging the old cell.
Since I have no li-ion/li-po charger, I decided to do a test.
Back when I got my SXG, it came with a aftermarket cheapo-battery (650mAh) at first I thought it was too small, but the main reason is in different type of protection circuit used in the SXG75 battery.
If you try one of the older batteries, the phone tells you that you have inserted wrong type of battery, how smart is that? If it could be any smarter,
it would say "Please replace the protection circuit in your battery with a correct type"
Note: The photos show how I took the SXG75 circuit from an aftermarket CX65 battery and put it back to my almost unused original SXG75 battery,
thats why there is the SXG75 circuit in the pictures of removing the CX65 circuit.
So there should be no misunderstanding. The photos also show the exhanced circuit.
What needs to be done:
1. Get your hands on a original SXG75 battery.
2. Loosen the battery cover with razor blade,
carefully, if you want to keep the battery from looking modded.
It is very difficult to keep it from that look.
Use high caution not to damage the Li-Ion cell.
Notice that there is little flaps on the cover, so if you want to keep the cover fully intact,
watch the photo closely and see where they are before braking them with the blade.
3. Lift the cover and at the same time give it a little twist so the
metal contacts will bend and the cover can be removed.
4. Now you need to remove the cell itself.
If you dont care, you can peel the back sticker off (SIEMENS LITHIUM ION), it will help a bit getting the cell out.
The cell has got a 2-sided sticky tape on it, so you need to bend the plastic base a bit.
Be careful, the plastic is really soft and fragile.
(just a sample pic to get the idea, I don't recommed using raxor blade to that)
5. Unsolder the connects of the protection circuit. Be sure to keep in mind which way the PCB was installed.
6. Take your old non-SXG75 battery (or new aftermarket spare) and strip it down to the cell and protection circuit.
7. Unsolder the circuit as shown in step 5.
8. Take the SXG75 circuit and solder it to this battery.
9. Install the cell with new circuit to the frame
10. Make sure there is >definately NO shot circuits< and protect the connects. For example, hot glue works, but it can be difficult to remove, if needed.
11. Bend the connects straight in order to keep them in their original angle.
Then put the cover back.
12. It will most probably look something like this after the procedure.
You should use some glue to get the cover back to its original position.
13. Test the new battery unit
14. Enjoy your new fully operational cheap battery!
DO THIS ABSOLUTELY AT YOUR OWN RISK. LI-ION CELLS CAN BE REALLY DANGEROUS IF SHORT-CIRCUITED, ABUSED OR USED INCORRECTLY
Keep in mind that the PLUS (+) pole of the battery is the whole shell of the cell! MINUS pole (-) is the small pole on the side!
The Original battery of SXG75 has 1000mAh, so you should keep it close to that or more. I haven't tested any smaller cells in normal usage.
I will add some pictures, after I get the battery charged.
All pictures were taken with S88 and almost all have 50% digital zoom.
I have no clue where that dark spot has come.
It's been shoving for a while now. It shows in the screen when taking a picture.
The LED flash reflector gives the "stripes" to the pictures.
[Offtopic]Please exalt me! I need kArmA[/Offtipic]
and the protection circuit from Original spare SXG75 battery.
What I wanted to do, was charging the old cell.
Since I have no li-ion/li-po charger, I decided to do a test.
Back when I got my SXG, it came with a aftermarket cheapo-battery (650mAh) at first I thought it was too small, but the main reason is in different type of protection circuit used in the SXG75 battery.
If you try one of the older batteries, the phone tells you that you have inserted wrong type of battery, how smart is that? If it could be any smarter,
it would say "Please replace the protection circuit in your battery with a correct type"
Note: The photos show how I took the SXG75 circuit from an aftermarket CX65 battery and put it back to my almost unused original SXG75 battery,
thats why there is the SXG75 circuit in the pictures of removing the CX65 circuit.
So there should be no misunderstanding. The photos also show the exhanced circuit.
What needs to be done:
1. Get your hands on a original SXG75 battery.
2. Loosen the battery cover with razor blade,
carefully, if you want to keep the battery from looking modded.
It is very difficult to keep it from that look.
Use high caution not to damage the Li-Ion cell.
Notice that there is little flaps on the cover, so if you want to keep the cover fully intact,
watch the photo closely and see where they are before braking them with the blade.
3. Lift the cover and at the same time give it a little twist so the
metal contacts will bend and the cover can be removed.
4. Now you need to remove the cell itself.
If you dont care, you can peel the back sticker off (SIEMENS LITHIUM ION), it will help a bit getting the cell out.
The cell has got a 2-sided sticky tape on it, so you need to bend the plastic base a bit.
Be careful, the plastic is really soft and fragile.
(just a sample pic to get the idea, I don't recommed using raxor blade to that)
5. Unsolder the connects of the protection circuit. Be sure to keep in mind which way the PCB was installed.
6. Take your old non-SXG75 battery (or new aftermarket spare) and strip it down to the cell and protection circuit.
7. Unsolder the circuit as shown in step 5.
8. Take the SXG75 circuit and solder it to this battery.
9. Install the cell with new circuit to the frame
10. Make sure there is >definately NO shot circuits< and protect the connects. For example, hot glue works, but it can be difficult to remove, if needed.
11. Bend the connects straight in order to keep them in their original angle.
Then put the cover back.
12. It will most probably look something like this after the procedure.
You should use some glue to get the cover back to its original position.
13. Test the new battery unit
14. Enjoy your new fully operational cheap battery!
DO THIS ABSOLUTELY AT YOUR OWN RISK. LI-ION CELLS CAN BE REALLY DANGEROUS IF SHORT-CIRCUITED, ABUSED OR USED INCORRECTLY
Keep in mind that the PLUS (+) pole of the battery is the whole shell of the cell! MINUS pole (-) is the small pole on the side!
The Original battery of SXG75 has 1000mAh, so you should keep it close to that or more. I haven't tested any smaller cells in normal usage.
All pictures were taken with S88 and almost all have 50% digital zoom.
I have no clue where that dark spot has come.
It's been shoving for a while now. It shows in the screen when taking a picture.
The LED flash reflector gives the "stripes" to the pictures.
[Offtopic]Please exalt me! I need kArmA[/Offtipic]