User manual

9
Fig. 3: The battery,
real and as circuit symbol
Do not use any alkaline batteries or rechargeable batteries, but only
simple zinc carbon batteries. The alkaline battery may have a longer
service life, but it has a big disadvantage: Like a rechargeable battery,
it delivery very high currents of up to more than 5 A in case of error,
which will strongly heat think wires or the battery itself. The short circuit