Simple NiMH battery charger (with PCB files)
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Charging NiMH cells - smart vs dumb chargers
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What's inside Eneloop and LIDL NiMh cells (fire, apparently)
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Using salvaged lithium cells to power LEDs directly. (with protection test)
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15 trucos geniales para el hogar que cambiarán tu vida al instante
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Simplest solar light possible, using old phone battery.
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How to Make 1.2V Battery Charger | Automatic Battery Charger
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Abriendo un cargador USB de baterías muy barato y de mala calidad.
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