Buy rechargeable batteries. Never worry about batteries again. ## The batteries Buy according to the appliance. - [IKEA LADDA AA 2450](http://www.ikea.com/no/no/catalog/products/70303876) - [IKEA LADDA AA 1000](http://www.ikea.com/no/no/catalog/products/20303874) - [IKEA LADDA AAA 900](http://www.ikea.com/no/no/catalog/products/90303880) - [IKEA LADDA AAA 500](http://www.ikea.com/no/no/catalog/products/30303883) You can also buy Eneloops from [NKON](https://ru.nkon.nl/). ## Storage - [Storacell AA](https://www.heinnie.com/storacell-aa-battery-case) (£4.95) - [Storacell AAA](https://www.heinnie.com/storacell-aaa-battery-case) (£4.95) Shipping to Norway = £6 Total = £15.90 ## Why? IKEA batteries are said to be sourced from FDK (Fujitsu) who also make Eneloop batteries that cost a lot more. See [Are IKEA batteries Eneloops in disguise?](http://www.provideocoalition.com/ikea-batteries-eneloops-disguise) [More information at Reddit](https://www.reddit.com/r/batteries/comments/4n7b0a/ikeas%5Fnew%5Fladda%5Fbatteries). [Even more information](http://www.candlepowerforums.com/vb/forumdisplay.php?9-Flashlight-Electronics-Batteries-Included). ## Solar energy 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](https://www.aliexpress.com/store/product/2015-Liitokala-Lii-100-1-2V-3-7V-3-2V-3-85V-AA-AAA-18650-18350/133859%5F32554136424.html) can be combined with a [solar panel](https://www.amazon.com/dp/B01HD6AO9K/). You can charge the phone at night when there is no sun. It’s like a mini [Tesla powerwall](https://www.tesla.com/powerwall). There is also the [Nitecore F1](http://charger.nitecore.com/CHARGER/F/F1/) (and F2) which might be a more reputable brand. Also, the IKEA Koppla is a decent USB plug. Fun chains: - Solar panel → LiitoKala Lii-100 → USB power meter → USB LED - Solar panel → LiitoKala Lii-100 → USB power meter → Raspberry Pi ## Interesting stuff [YouTube - What’s inside Eneloop and LIDL NiMh cells (fire, apparently)](https://www.youtube.com/watch?v=tBg4ximDrsk) [LiitoKala Lii-500](https://www.aliexpress.com/store/product/2015-Liitokala-Lii-500-NiMH-Battery-Charger-3-7V-18650-26650-1-2V-AA-AAA-5/133859%5F32371732440.html) - Nice charger that can be used as a USB power bank. Review [here](http://lygte-info.dk/review/Review%20Charger%20LiitoKala%20Lii-500%20UK.html). Be careful with chinese electronics though. [YouTube - Yes, Batteries Are Our Future. Here’s Why.](https://www.youtube.com/watch?v=dOn-L6nUS54)