To keep your search simple, this section includes all chemistries of aa size batteries in one area. In some instances, you can substitute chemistries, but in other cases, you cannot. for example, in most instances, NiMH will replace NiCd batteries and also most alkaline batteries. (some devices will not like the lower voltage of the NiMH, but most are fine.) please check the voltage of the storm that you wish to replace. Lithium-ion batteries will not replace regular consumer aa batteries. If the size of your battery is shown below, regardless of the chemistry of your battery, you should find it in the size sections shown below.