Eneloops are the ONLY way to go....
There are also now a number of vendors who have the Eneloops available to fit inside the radios using cassettes for the battery pack like the 12X.
The 12X included charger is junk IMHO. Running at 12.0 volts rather than 11.6 it just flat cooks the batteries, anyone still using that charger IS going to have problems.