” It just takes 20 seconds to recharge !!! “
Here is an interesting project which uses capacitors to store energy
instead of chemical,sit uses an different type of capacitors called
Goldcap capacitors,GoldCap capacitors offer an interesting
alternative power source when compared to conventional disposable or
even rechargeable batteries. They can be charged very rapidly and can
also deliver a high peak output current. Their voltage rating however is
quite low so a little electronic assistance is necessary to raise the
output voltage to a more useful level.PP3 (6F22) type 9 V batteries are
often used in small portable equipment that require very little current
and may only be used intermittently. Under these conditions its often
the case that the battery is flat just when you urgently need to use the
equipment. NiCd rechargeable cells are not a good choice in these
applications because their self-discharge characteristics are much worse
than dry cells and often there is no charge left after a long time in
storage
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