Case for Heltek V3 with 18650 or 21700 battery
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Case for Heltek V3Fits Heltec V3 with soldered pins
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Case for Heltek V3
Fits Heltec V3 with soldered pins!
Requires: 4x M2x10mm screws and 4x M2 brass heat-set inserts.
Battery: Designed for a 21700 battery. For an 18650 battery, you must add a soft spacer (gasket).
BMS Required: You must use a battery protection board (BMS). Heltec does not have deep discharge protection and will drain the battery below 2V, damaging it.
Buttons: Use transparent plastic for the buttons so the LED light can shine through.
Charging: The built-in Heltec charge current is only 150–200mA. The battery will charge very slowly.
Power Consumption:
ESP32-S3: ~120mA (idle) or ~30–50mA with optimized firmware.
SX1262 (LoRa): ~5mA (idle/RX) and up to 140mA @ 22dBm during packet transmission (lasts less than a second).
Future Upgrade: A future case version may include an external charging board with a BMS (like a TP4056 module). There is already some free space inside for this.
FreeCAD sources available! Edit it for your needs!