This version of the now classic "intelligent emergency lamp" has the most minimalist circuitry seen yet, and what appears to be an SLA (Sealed Lead Acid) battery. In one area it has cut cost a bit too much and in another area it is fiendishly clever in using just a single transistor in its active circuitry.

I just had to take the lead acid battery apart to see what was inside. Mainly lead and acid apparently. Quite a lot of lead too - I guess they have to get rid of all that lead somewhere.

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