NiMh are still prone to memory issues, but not on a single or double abuse basis. It takes them longer to develop the effect but it still happens. To prevent it just discharge them fully atleast every 5-10 cycles (the number I use, others opinions are different im sure). The other option is to go all out custom and use lithium AA rechargable cells (expensive and you have to have a special charger, not to mention potential voltage issues if you dont know what your doing). My general rule of thumb is to always have a set of non rechargable lithiums that I never use unless the rechargables are dead and then replace them after use (and use them in another device around the house that isnt as "critical").