Designed by ACE Design Studio in China, Pi-Ener-lite is a dedicated UPS system specifically for the Raspberry Pi Zero series. This device supports a 18650 battery, switching automatically to battery power when external power is lost. With a design that utilizes seven pogo pins for simple and effective connection to the Raspberry Pi, Pi-Ener-lite keeps the upper GPIO header free for use with other HATs, ensuring great flexibility. Additionally, the board integrates an RTC chip and a battery monitoring system, offering multiple protections and efficient power management. The device is available on Tindie for $35, along with parts for a 3D-printable enclosure.

Critical Analysis

Pi-Ener-lite represents an excellent solution for those seeking a portable power source for the Raspberry Pi Zero, combining practicality with advanced features such as battery monitoring. However, it may be seen as an additional investment for beginners, especially considering it does not include either the Raspberry Pi board or the battery. Furthermore, the competition in the Raspberry Pi UPS market is growing, with alternatives like the PiSugar3 and other pricier solutions, which may affect consumer choice.

Pros and Cons

Pros	Cons
Easy installation and integration	Price does not include Raspberry Pi and battery
Comprehensive battery protection	Final dimensions still to be confirmed
Supports simultaneous charging and discharging	Might not be a first purchase for beginners
Offers RTC functionality and battery monitoring	Growing competition in the UPS sector

Sources

Author: Debashis Das
URL: https://www.cnx-software.com/2026/08/17/pi-ener-lite-a-compact-18650-ups-board-for-raspberry-pi-zero-with-rtc-and-fuel-gauge/
Publication Date: 2026-08-17

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