Quick summary: M5Stack released the Stamp Timer Power2 on 30 October 2026, a US$6.95 power-management module designed to switch and wake a separate embedded system. It combines timed and interrupt wake-up, two selectable Li-ion charging rates and several controlled power rails in an 18 × 14mm castellated package. It is not an ESP32PriceAliExpress price board and does not provide Wi-Fi, Bluetooth or application firmware.
A power controller, not another ESP32 board
The Stamp Timer Power2 sits between a battery or 5V source and the hardware that needs power. M5Stack says it can turn the main controller and peripherals on or off in stages, wake them on a schedule, or respond to an external interrupt. That makes it potentially useful beside an ESP32AliExpress price, sensor node or data logger whose complete board draws more current than the chip’s deep-sleep figure suggests.
M5Stack describes the power-control function as M5PM1, while its store listing identifies the onboard microcontroller as a PY32L020. The distinction matters: this small controller manages power for another processor; it is not a replacement for the ESP32-S3PriceAliExpress price used on products such as the M5Stack PaperDIY or the controller inside the AtomS3 Lite.
Power rails, charging and control
The module measures 18 × 14 × 2.2mm, weighs 0.7g and uses a 28-pin castellated package with 1.27mm pitch. Its documented outputs include a 3.3V, 0.6A DC-DC rail and two 3.3V, 0.4A rails, plus a bidirectional 5V path rated at 1A. A 3.7V Li-ion cell can power the module, and the LGS4056HDA charger can be set to either 180mA or 650mA.
Host communication uses I²C at address 0x6E, with 100kHz as the default bus speed and 400kHz supported. Five programmable pins can be assigned as GPIO, ADC, PWM, RGB LEDPrice or interrupt functions. M5Stack also documents a power-button input, a status indicator and a boot-control connection to the main MCU.
Why the microamp figures need context
M5Stack specifies 6.72µA in shutdown and 12.27µA in low-power sleep at 4.2V. Those figures are useful because a timer that completely removes power from a development board can avoid losses from regulators, USB interfaces and always-on LEDs. They are measurements for the power module, however—not a promised current for a finished ESP32 product. Battery protection, sensors, leakage paths and the selected host board still determine the real sleep budget.
The company provides an interactive browser demonstration covering the pins, power paths and register interface. That should make early evaluation easier, although firmware support still has to be written for the chosen host. The module’s presence does not by itself imply Arduino, ESP-IDF or ESPHome support.
Price, availability and practical limits
M5Stack’s online store listed the Stamp Timer Power2 at US$6.95 and showed more than ten units available when checked. Delivery charges, taxes and regional availability vary, and no UK-specific price was confirmed.
This is a solder-down integration part rather than a plug-and-play development board. Designers must still choose an appropriate protected cell, respect its charging limits and account for thermal conditions. The selectable 650mA setting will not suit every small battery. Used within those limits, the module offers a compact way to add scheduled hard power-cycling to low-duty-cycle IoT hardware.
Sources
M5Stack release history (release dated 30 October 2026)
