My old Futaba 7chp transmitter battery died after I continued using it after the low battery indicator.
How can I revive the battery ? Need help on this one !

Thanks

Remove the battery pack from tx, connect it to your charger, set the settings according to the pack,
set current to 100-300 mah only and start charging.

For how many hours ?

thanks

Charge untill battery voltage reach to approx 9V

NiCd battery didnt die like LiPos ...........just charge them and they will be alive