Wifi extender and controller battery life before replacing

[Torcan]

I have searched this forum and not found the answer I am looking for
I realize the batteries in both must be re=charged

my question is this:

How long before the batteries in both the wifi extender and the controller will no longer be able to be re-charged and have to be replaced?

Also, does anyone have the part numbers for them, and should I pick some extras up now for the eventual replacement?

Phantom 2 Vision + V3 (internal battery)

 

[msinger]

Here's a compatible range extender battery:
http://www.mouser.com/ProductDetail...RbLyvlpnF2gJWsEa/Sm/42uEaiY82kPq693DG0oxGzQ==

The range extender battery is not a common replacement item, so there is no need to buy a backup. I've never seen anyone mention the need to replace the remote controller battery.

 

[robsquad]

erm , sorry to but in but i have been looking at this today as my remote starting to drop battery level a bit quick. looks like time to get it apart and start googling

 

[Keelbyfish]

Must be loads of used ones around after crashes flyways etc.
Think