Buy rechargeable batteries.
Never worry about batteries again.
Buy according to the appliance.
You can also buy Eneloops from NKON.
Shipping to Norway = £6
Total = £15.90
IKEA batteries are said to be sourced from FDK (Fujitsu) who also make Eneloop batteries that cost a lot more.
I like to use solar panels just to keep on top of the technology. It’s supposed to be the future and all. So I’m doing these fun small scale experiments.
LiitoKala Lii-100 can be combined with a solar panel. You can charge the phone at night when there is no sun. It’s like a mini Tesla powerwall. There is also the Nitecore F1 (and F2) which might be a more reputable brand.
Also, the IKEA Koppla is a decent USB plug.
- Solar panel → LiitoKala Lii-100 → USB power meter → USB LED
- Solar panel → LiitoKala Lii-100 → USB power meter → Raspberry Pi