I bought a battery tender so as to maintain full charge on my
problematic rider battery. It bothers me that the male plug for the
ting is only 2-prong. Seems to me that I connect it to AC source
backwards, that it could cause charging problems. Can it?
Or am I just paranoid?
Yup, paranoid. The charger is built around a transformer that isolates
the 120 VAC power input from the DC output. Reversing the plug does not
affect the DC output in anyway.
Having a third prong would permit the (metal?) case of the charger to be
grounded. This means that an internal short in the charger would not
give you a shock. But it is just as safe to make the case out of an
insulator such as plastic and physically arrange the wiring so it cannot
chafe or break.
Just now I connected the tender up and get proper indicator lights and
voltage polarities no matter which way I connect the plug.
So I would think that you are indeed very right.
Thanks for reply
One day I will find my short though. Now up to 7V! Must be the
If the battery is good, it should be unnecessary to use a battery
tender during the mowing season. If you use the mower once a week for
a half hour or so, that should keep it charged. The tender is needed
in the winter, when the battery isn't being charged by the mower. And
I sure wouldn't use it to allow leaving the battery connected. Until
you find the short, the battery should be disconnected after each use.
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