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It seems like my Eneloops doesn't like -20 Celcius
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thm_w:
Which module?
Looking at RFM69HW they say: Supply voltage(1.8V-2.4V 17dBm, 2.4V-3.6V 20dBm)
2.4V is quite high, although I don't know if it actually crashes below that voltage, or it just doesn't hit the full transmit power.

Could be that some added capacitance, or a boost/buck-boost converter might be a solution.


--- Quote from: mjs on December 19, 2022, 05:23:47 pm ---For low temperatures, you'll want lithium cells, NiMH and especially NiCd are notoriously bad there. Enegizer Ultimate AA cells, Saft LS/LSH series are my primary cells of choice there and for rechargeables my first choice is Saft MP 176065 XLR, which can be *charged* down to -30°C and discharged way lower depending on application.

--- End quote ---

That is cool, I just assumed all lithium would need cell heating.
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