Where can i get transmitter battery packs? Which should i go for LiPo, NiCd, NiMh? Everyone online seems to be out of stock
Go for a lipo pack. Which radio do you have ?
A single charge will last you over a month.
I have a WFLY-FT06A transmitter.
But what should be the specification of the battery?
You should have a lot of options on hobbyking or better try out LHS.