How to select the best battery for my LoRa node?
summary
Compares battery chemistries and gives a concrete energy budget worked end to end, showing how sleep current, wakeup and transmit current spikes and regulator losses determine lifetime. Uses measured currents with a power profiler and coulomb counter, shows datasheet figures are optimistic, and gives sample lifetimes for different sending rates (one message per day versus hourly) and power settings. Compares alkaline vs lithium primary cells and shows which combinations actually meet multi‑year claims.
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