The M5Stack Base AAA is a '5x5cm' series base with a 4x AAA battery holder. Unlike lithium battery bases, the Base AAA is powered by safe and reliable standard AAA batteries, and the onboard power switch allows for manual power shutdown, reducing battery drain. Port B and Port C are reserved for expansion, and 1x12-Pin 2.54mm pitch female expansion connector is provided. There are mounting holes on the side for easy fixing and expansion. The bottom supports magnet and screw mounting. Features * 1x 12-Pin 2.54mm interface * Port B, Port C * Physical power switch * Supports two types of power supply: * Power supply by four AAA Batteries, DC/DC buck 6V -> 4V, connect with BUS bus BAT pin * External power supply with Dupont cables, to BAT/GND of the 12-Pin 2.54 interface * Multiple fixing methods: * Magnet fixing on the bottom * Two nuts on the bottom for screws * Three fixing holes on the side Package Contents * 1x Base AAA * 1x M2 Hex Key Batteries not included Specifications Spec Parameter Net weight 30g Gross weight 51.2g Product Size 54*54*21mm Package Size 95 x 67 x 25mm Resources * Product documentation * Schematic https://elecena.pl/product/22727868/m5stack-base-aaa-battery-holder 2023-03-07 https://elecena.pl/product/22727868/m5stack-base-aaa-battery-holder 2023-12-27 https://elecena.pl/product/22727868/m5stack-base-aaa-battery-holder 2024-09-18 https://elecena.pl/product/22727868/m5stack-base-aaa-battery-holder 2024-11-29 https://elecena.pl/product/22727868/m5stack-base-aaa-battery-holder 2024-11-30 https://elecena.pl/product/22727868/m5stack-base-aaa-battery-holder 2025-04-29 https://elecena.pl/product/22727868/m5stack-base-aaa-battery-holder 2025-11-28 https://elecena.pl/product/22727868/m5stack-base-aaa-battery-holder 2025-11-29