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Is there any difference between sizing a lithium-ion battery compared to VRLA or NiCd technology?

Yes, the sizing is slightly different and in the case of lithium, we limit the backup time based not only on low cell voltage limits, but also the cell temperature during discharge.  This means the cutoff time for a lithium battery might be dictated by high temperature, as opposed to only low voltage. Eaton’s published battery time tables for our UPS products take this into account, and our application engineers are trained on proper sizing of these batteries. As always,feel free tocontact Eatonfor sizing guidance.