Excellent advice. Did you swap any of the cells with a different chemistry?

Not really, there was a brief excursion in kludging a ZTE MiFi device to use a DIY NiMh pack of AA cells when it refused to stop self-destructing its OEM LiPo batteries every summer. (I use a MiFi hotspot for a cheap security camera network)

It worked as a stop-gap but I've since replaced it with a GL.Inet X300b ruggedized hotspot without any batteries.

There's no UPS for now... if I went the route of wanting uninterrupted power at the property I'd probably put a battery bank underground outside to power the entire building. It's not worth risking anything rechargeable inside the place given how hot it can get, and how long I sometimes go without visiting.

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The_President 4 hours ago | parent [-]

Cheers, Thanks for the info.

	▲	pengaru 3 hours ago \| parent [-]
		I'm not sure how generally applicable it is. When you have several acres of undeveloped land full of sand at your disposal it's relatively trivial to dig a pit, mix some concrete from the sand you excavated, and pour a subterranean cellar to house a battery bank and other hazardous infrastructure. Nobody would even notice it happened/exists. The situation is far more complicated for folks in apartments or high density housing.