power

18650 Li-ion battery cell

Cylindrical 18650 lithium-ion rechargeable cell. Buy from a reputable brand; capacity claims on cheap no-name cells are often inflated.

Specifications

Format	18650
Nominal voltage	3.6-3.7 V

Projects Using 18650 Li-ion battery cell1

LIA: an open-source Meshtastic GPS tracker for your pet's collar

Illustration

ESP32ESP32-S3

LIA: an open-source Meshtastic GPS tracker for your pet's collar

A custom ESP32-S3 + SX1262 + GNSS collar board that runs Meshtastic and reports your dog's position over LoRa as direct messages, with no cellular service.

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8 parts listed

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