Certain Battery is a type of rechargeable battery that is commonly used in many electronic devices. The three crossword solutions for this term are NICAD (5 letters), AACELL (6 letters), and AAACELL (7 letters). NICAD stands for Nickel Cadmium, which is a type of battery that uses nickel oxide hydroxide and metallic cadmium as its electrodes. AACELL is an abbreviation for Alkaline-Manganese dioxide, which is a type of battery that uses manganese dioxide and zinc as its electrodes. AAACELL stands for Advanced Alkaline-Manganese dioxide, which is an improved version of the Alkaline-Manganese dioxide battery.