I have the IBBS and works great but some times when i dont fly over a week or two the battery lost his charge so i use the ibbs wall charger and the battery gets charged fully again.
On Osh i ask TCW people for the life time of the battery and they told me that it has about 2 or 3 years, then you have to change the battery sending the unit.
I think i will wait until the new Li-Fe-PO4 6ah were available to change mi 4 ah NI-MH old one.
You have to full charge the battery and make a test with the equipment on. If you have less than 30 min you have to change the bat.
RV-7 TMX-IO-360 G3X and VPX Flying over Chile
2018 Dues Paid