ESP32 Li-ion Battery & Power Module
Cut the cord: rechargeable power every project reuses.
- Track
- POWER
- Level
- L2
- Prerequisites
- 1
- Status
- Coming soon
▸ Register interest
This board is on the bench. Leave your email and you'll be first in when it ships, and your interest helps decide what we build next.
What you'll build
Cut the cord. Design a rechargeable single-cell Li-ion power module with proper charging, load-sharing (so the board runs while it charges), and clean, low-noise rails using an LDO after a switching regulator. It's built as a reusable building block — every portable board later in the curriculum reuses this exact power design.
It sits on the POWER track: power delivery, including batteries, charging, protection, and the clean rails everything else depends on.
Tools for this build
Free calculators that do the math this board needs. Each is worked from a real OTD board, with the formula and a cited source.
- LiPo battery runtime calculator (ESP32 / microcontroller)Estimate runtime from battery capacity, average current draw, and usable capacity. Worked from a real ESP32-S3 board's measured budget.
- LDO headroom + dissipation calculator (linear regulator)Check a linear regulator's headroom against its dropout and find the power it dissipates as heat, from Vin, Vout, dropout, and load current.
Part of the path from your first board to a brain-computer interface. See the full skill tree →