Super-simple DIY charger for NiMh button cells.

I bought a batch of NiMh button cells from an eBay seller to repair solar garden lights. Before storing them I decided to top their charge up, and made a small loom to do several at once. Note that you can't use this circuit for lithium cells.
The terminal crimping tool I use is specifically for those crimps and I'm not sure if the common eBay units will work with them. I got mine from a UK seller called Rapid Electronics.

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