Portable Power 2 is the next iteration of the original Portable Power, extended with an undervoltage lock-out (UVLO) system that prevents draining the battery below its critical treshold. The board measures 55 by 36.5 mm and is designed to be integrated in a portable battery pack.
Any lithium ion battery type (including lithium polymer) can be used. Thermal shutdown is not included.
- Rev. 0.1: initial design without UVLO
- Rev. 0.2: UVLO added
- Rev. 0.3: swapped LM358 opamps for LM393 comparators, adjusted board shape