A 3.7 V 500 mAh lithium-polymer cell, pre-wired with a 2-pin JST-PH connector and built-in protection circuitry. Drop-in power for small electronics: prop and cosplay builds, Adafruit Feather and other JST-PH microcontroller boards, RC and model projects, and anything else that needs a compact rechargeable cell.

Specifications

• Nominal voltage 3.7 V, capacity 500 mAh (approx. 1.9 Wh)
• 2-pin JST-PH connector, polarity matched to Adafruit Feather boards
• Protection circuitry against over-charge, over-discharge, and output shorts
• Recharges in place on any host board with an onboard LiPo charger, such as the USB-C port on a Prop-Maker Feather

Check your polarity before plugging in

JST-PH is a common connector, but the wiring behind it is not standardised. Some brands reverse the two conductors, which can damage a controller instantly. This cell matches the Adafruit convention. If you are swapping in a battery from another supplier, confirm the pinout against your board first.

Fits the Whistling Birds gauntlet darts module

This is the cell the Whistling Birds module was designed around. The internal battery chamber is sized for it, it charges in place through the module's USB-C port, and it runs the prop for 6 to 8 hours at full brightness.

Ships within the US only

Postal rules for loose lithium batteries limit this item to US addresses. International builders can source any 3.7 V 500 mAh JST-PH LiPo locally, checking the connector polarity as above. A USB-C power bank also works as a power source.