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Compact rectangular battery chassis with USB-C port, four Grove connectors, status LEDs and power button

Seeed Studio

Seeed Studio Wio Terminal Battery Chassis 650mAh

SKU CH-Y0XX-WR32G

Adds a 650 mAh Li-Po battery, USB-C charging up to 660 mA, a BQ27441 fuel gauge and four Grove ports to the Wio Terminal

  • TypeSensors
  • 650 mAh Li-Po cell powers Wio Terminal projects
  • BQ27441-G1A fuel gauge reports exact charge state
  • USB-C port accepts up to 660 mA charging current
  • Four Grove analog/digital ports expand sensor options
  • Over-current and hiccup protection guards battery health

Battery Chassis for Wio Terminal

This chassis adds a built-in 650mAh lithium polymer battery to the Wio Terminal, turning the device into a portable sensor platform. It suits developers who need untethered data logging or field demonstrations without relying on a permanent USB supply. The unit includes four Grove analog and digital ports plus one I2C and one UART connector for sensor expansion.

Sustained Operation with Fuel Gauge

The BQ27441-G1A fuel gauge monitors the cell continuously, reporting remaining capacity during long logging sessions rather than only at start-up. Charging accepts a 4.75V to 5.25V supply at up to 660mA through the USB Type-C port, while over-current and hiccup protection guard the cell under prolonged load. Status LEDs show charging, discharging and 5V output states at a glance.

Simple Attachment, Sleep Mode Required

The chassis clips onto the terminal and draws power automatically when the battery switch is on. If the cell is disconnected the board enters a failure mode with a blinking green LED, so the battery must stay seated during use. Pressing the on-board button puts the unit into sleep mode for safety, extinguishing the rear LED until the next wake-up.

Highlights

  • 650 mAh Li-Po cell powers Wio Terminal projects
  • BQ27441-G1A fuel gauge reports exact charge state
  • USB-C port accepts up to 660 mA charging current
  • Four Grove analog/digital ports expand sensor options
  • Over-current and hiccup protection guards battery health

Specifications

TypeSensors

Questions about this item

How hot or noisy does the chassis get when it runs continuously?

The board has no fan and no active cooling; it relies on passive heat dissipation from the BQ27441-G1A fuel gauge and the overcurrent protection circuitry.

What must I already own for the battery chassis to function?

You need a Seeed Studio Wio Terminal main board; the chassis attaches to its 40-pin connector and adds a 650 mAh Li-Po cell, USB-C charging at up to 660 mA, and four Grove analog/digital ports.

Will the chassis work with an older Wio Terminal revision I already have?

Yes — the chassis connects through the standard 40-pin header, so any Wio Terminal with that header can use the 650 mAh battery, the BQ27441-G1A gauge, and the Grove I²C/UART ports.

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