X9d plus battery replacement advice needed

Which battery suitable for x9d plus help me...

I use that radio

I made my own using 2 X 18650

I had to make a new back cover to fit with 3D printing

Pic

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But you can use a LiFe 2S . Check the size first though

And if you move on from NiMH then change the low signal voltage alarm in the Tx

Thanks for replying bro

I'm interested in ur diy battery pack

Can u share more details like did u use BMS ....?

PLEASE SHARE SOME DETAILS 

What is BMS?

Look at these, it's pretty simple:

https://oscarliang.com/taranis-x9d-18650-battery/

https://www.thingiverse.com/thing:2990863

https://www.thingiverse.com/thing:567308