21700 UPS HAT (D) for Raspberry Pi 4/3

The Waveshare UPS HAT for Raspberry Pi 4 and 3/3B+ provides a stable 5V power supply and protects against power cuts, using two 21700-size Lithium-ion batteries (not included).

• The design accepts two 21700-size Lithium-ion batteries (not included).
• It features a built-in Li-ion battery charging chip with dynamic path control, a boost converter, and onboard monitoring.
• The board includes onboard protection circuits for overcharge, over-discharge, overcurrent, and short circuit events.