I bought a DieHard International "Maintenance Free" battery and would
like to know if I can just forget it for the next four years or so or if
it must be checked and topped up with H2O from time to time.
It's not a sealed battery, its caps (in a strip of three) can be pried
off with a screw driver and pressed back on, but that arrangement
doesn't seem like it's designed to be done with any frequency.
Sears web site doesn't discuss a "Maintenance Free" battery's on-going
maintenance. This battery has a 36 full warranty and 100 month prorated
So what do you know?
On 19 Ott, 22:45, "-->> T.G. Lambach <<--" <"T.G. Lambach at
I know that there are 3 types of lead batteries. The standard (i.e.
with maintenance and normal caps). The low maintenance (the one that
you describe). And the maintenance free, that's usually including a
more sofisticated capping system (the reason why maintenance is needed
less frequently), plus a so called 'magic eye', to instantly show
density of electrolithic liquid.
Then you might have Pb-gel, but it's not a good choice to start up an
In short: all of them need maintenance, but due to different
technology of the cover of battery AND caps, there's less evaporation
so it is less frequently needed to add water. But if you're not
driving in the Sahara desert and your alternator and charger
controller are in good shape, there' a small difference between the
three types. It's a sexy feature, invented for marketing reasons, imho.
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