AAA電池常用於小型電子設備，例如電視遙控器、MP3播放器和數位相機。若設備在相同電壓下需要較高電流，則會使用較大尺寸的AA電池。AA電池的容量是AAA電池的三倍。
然而，隨著現代電子產品效率提升與小型化，許多原本設計使用AA電池的產品，已逐漸被可使用AAA電池的型號所取代。AAA電池的長度為44.5公釐，直徑為10.5公釐。
AAA鹼性電池每顆約重11.5公克，而AAA鋰電池每顆約重7.6公克，充電式（鎳氫）電池通常重約14至15公克。AAA鹼性電池和鋰電池的標稱電壓為1.5V，而鎳氫或鎳鎘電池則為1.2V。AAA鹼性電池的容量通常為900-1155mAh（3240-4158庫侖）。
- 類型：AAA鹼性
- 技術：鹼性
- 電壓：1.5V
The 8-pack is perfect for keeping a stash of spares around, and the AA size fits snugly in my wireless mouse. These have lasted through months of daily use without any leakage or power drops so far.
The drawer of remotes and toys keeps emptying fast at my place, but this 8-pack has held up for months without a single dud. They sit snug in the plastic case too, so finding one in the dark is easy.
These eight AA batteries have powered my TV remote and a digital camera for months without needing a swap. They're holding up way better than the last pack I bought, and the price for eight is a solid deal.