I too was where you are about 10 -12 yrs ago. All my stuff was Ni cad or NIMH & my charger was a Hobbico Accu cycle elite. I ended up useing Li-ions for this reason only.... The charger would charge Li-ion packs up to 3 cells only i believe. So i bought Li-ion 2 cell 2600 mAh packs for everything from Fromeco. I have them in all my giant scale stuff with zero problems for years now &( i didnt have to buy a different charger)! I do use regulators on the batteries though. The packs are small & inexpensive & made it easy for me. I use the same packs for up to 3 years & then just change them out. Like i said there might be better stuff out there, but these worked for me with out haveing to buy another charger......Gene

PS I'm running 9 servos on most of my stuff 8411s, 8611s, 8711s etc