I kept having my taranis battery go flat on the field, when I had high capacity 18650's lying there fully charged for my goggles. So I've done this mod, which is an adaption to a few other mods going around (none currently allow for the batteries to be removable though.
Use the steps below to do this mod yourself!
I have included the 123Design File if you want to make your own adjustments.
Print quality is not critical. I am still working out PLA settings, so my prints were not perfect, and still work fine.
Step 1: Harvest/Purchase the Springs/Contacts
Step 2: Download Compatible Files and begin printing.
If your spring is shorter than 8mm before compression, use the AAA .stl files.
If 8mm or taller use AA .stl files.
Step 3: Solder contacts.
Solder 2 springs together with a cable approx. 20mm long.
***Solder each terminal (+ and -) to corresponding locations on a 2S balance lead.
- for the contact closest to the plug, this can be done before installation.
You may need to install the other spring contact prior to soldering connection.
Step 4: Cut supports out of back of Taranis.
Remove the two supports marked (X) and then dry fit your printed parts.
Step 5: Secure your printed parts into the bay
Use very thin double sided tape - or glue if you are happy that install will be permanent, to install printed files into the bay.
Note that the left hand (larger) part will need to be placed in the middle, and then slid towards left to clear the balance lead connector once connected.
Step 6: Install 18650's and screws.
Use good quality batteries from a reputable store to ensure good capacity.
Install screws so head is fully countersunk into the battery 'strap'.
Do not install battery cover without this 'strap' screwed down, it will make it very difficult to open the battery bay.
Step 7: CONGRATULATIONS
You are all sorted.
Make sure you ask any questions if you get here and it does not work, or you have had too much trouble with a step along the way!