Dell 5Y3T9 is a rechargeable laptop battery identified as type 47XV3. It is intended as a replacement for the Dell Latitude 9330 and Latitude 9330 2-in-1, the two compatible systems listed here.
The battery uses lithium-ion chemistry and a three-cell design, with a rated capacity of 50 Wh and voltage of 11.55 V. A distributor datasheet also lists Dell 05Y3T9 as lithium-polymer, with 4113 mAh, 50 Wh and 11.55 V ratings.
These identifiers and electrical ratings describe the battery variant associated with Dell part 5Y3T9. Check that your laptop is one of the listed Latitude models before choosing this replacement.