[a9h74j]

Just bought one of those garden night lights the other day. Have not taken it apart yet. It has a 2cm x 2cm cell on top and says it contains a 2/3 AA NiMH battery IIRC. Cost about $1.29.

That low price doesn't compare to a larger panel in efficiency, but the installation story is hard to beat.

[jcun4128]

Tagent: I was obsessed with this pi zero socket server design where you fit it into a wal-wart plug as they say and you just stick it on an outlet with a little rubber ducky antenna.