Lithium Backup Battery Pack

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Kurt h
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Re: Lithium Backup Battery Pack

Post by Kurt h »

They are in Kentucky, 270-826-6000 and ask for the parts dept. The parts guy I worked with in the past left, but the new guy was very helpful recently as well.

They can do all the DA-40 parts I have needed over the years. Be ready with the Diamond part number from the online catalog.
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dwurfel
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Re: Lithium Backup Battery Pack

Post by dwurfel »

Thanks Kurt.
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Re: Lithium Backup Battery Pack

Post by dwurfel »

I used Don Davis aviation for my new pack on my 12 XLS. They had one on the shelf. Price was comparatively reasonable and they were great people to work with.
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Re: Lithium Backup Battery Pack

Post by Sandy »

Does anyone have an expired D41-2560-93-00 (12 cell) backup battery pack that they are willing to give up? If so, please PM me.

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Re: Lithium Backup Battery Pack

Post by Sandy »

In my ongoing research relating to changing out Li-ion cells in various devices (including the popular Tile "item locators"), it appears that the issue is that it can be quite dangerous to simply solder to a cell, as the heat from the soldering iron can do (really) bad things when applied. Accordingly, I found that the proper way to make permanent connections to such cells involves the use of a battery spot welder, which uses a two point probe to spot weld a metal strip to the cell. As I have a number of Tiles (attached to various key rings, etc.), and as they use commonly available CR2032 cells, that are "permanently" within the sealed plastic Tile unit, I am considering the acquisition of a battery spot welder, with which I believe that I would be able to properly "service" the backup battery, or at least replace the CR2032's in my numerous Tiles.

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Re: Lithium Backup Battery Pack

Post by dwurfel »

Looks as though you can get a spot welder on ebay for about $120. Guess it would pay for itself first time out. Wish I had some other applications for it. Let us know your progress.
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Re: Lithium Backup Battery Pack

Post by rwtucker »

Sandy, You raise a very important point in the risks of soldering. However, if you have the right equipment (in this case a high wattage, not a low wattage iron, preferably a gun) and are proficient in temperature management techniques, I do not see a risk. I have soldered heat sensitive components since I built my first home brew receiver at age five and have been creating batteries from Li-Ion cells since they have been on the market. With the right techniques, you will generate low internal cell heat with less risk of a faulty connection than you will experience with a manual micro spot weld. I have not had a failure among the hundreds of cells I have soldered. Anyone can do as well with a little practice.
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