Maintenance Free (MF) Battery
Maintenance Free (MF): This refers to a battery which is sealed and does not require the addition of distilled water. SLA (sealed lead-acid) and VRLA (valve-
regulated lead-acid) are always MF. These batteries are often made with excess electrolyte calculated to compensate for water loss during a normal lifetime. MF batteries are virtually maintenance free because they are sealed and you do not monitor the electrolyte within the battery. In ambient temperatures, charge MF, SLA and VRLA batteries using the NORM Mode.
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