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I have searched on Google but can't find anything. Could anyone please tell me what a maintenance free battery is? Perhaps some examples of maintenance free batteries and any good sites for further research could be provided.

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The term "Maintenance Free Battery" is typically applied to sealed lead-acid batteries such as used for UPS units.

Traditional lead-acid batteries for automobiles needed the battery electrolyte topped up from time to time with distilled water, whereas the maintenance free ones neither need, nor support such maintenance.

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  • \$\begingroup\$ Thank you so much for answering could you please providing me some example of "Maintenance Free Battery" \$\endgroup\$ – Pritesh Jun 23 '13 at 5:42
  • \$\begingroup\$ google.com/… \$\endgroup\$ – Anindo Ghosh Jun 23 '13 at 5:57
  • \$\begingroup\$ @Anido Ghosh, Does Lithium and Ni-Cd battery are Maintenance Free Battery? Thank you so much for answering Anindo bhai. \$\endgroup\$ – Pritesh Jun 23 '13 at 6:24
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    \$\begingroup\$ @Pritesh No, the term is typically applied only to Sealed Lead Acid (SLA) batteries. \$\endgroup\$ – Anindo Ghosh Jun 23 '13 at 6:52
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mantainance free bateries are the sealed ones, which you can't add clean water+sulphuric acid except in some cases i've seen people perforates the battery to reuse them mostly for a short time-period results as the sealed batteries have thinner lead plates which consume as fast as the chemicals so it would give you a margin of a months? until you replace them for newer ones

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