Maximum volt, nominal volt, critical volt??
@SANJAYMR for which LiIon cell you are looking as there are different chemistry with differnent values are existing. Here most common LiPo has max 4,2V; nom 3,7V; crit; 2,75V
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He is asking for Lithium Ion, not Lithium Polymer.
But yes, it depends on the manufacturer. And he hopes we guess that 
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@amilcarlucas, yes, but most user don’t now difference between LiIon and LiPo. And specially in LiIon we have several very different chemistry like NMC; NCA; LFP; LCO; LMO; LTO.
We don’t know what he is looking for
These are typical values:
| Batteries | Hi | Crt |
|---|---|---|
| LiIon | 4.1 | 2.8 |
| LiIonSS | 4.2 | 2.7 |
| LiIonSSHV | 4.45 | 2.7 |
| Lipo | 4.2 | 3.3 |
| LipoHV | 4.35 | 3.3 |
| LipoHVSS | 4.2 | 3.2 |
They could be further refined by manufacturer for Li Ion cells.
You can get the correct Ardupilot values calculated for you in this spreadsheet (or in MissionPlanner Initial Parameters , but it needs an update to add more types)
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