Battery question

[Hamaru]

Hello being the owner of this pc: HP Pavilion Gaming Laptop 15-cx0xxx for two and a half years,
I have, for two or three days, at each start, a message telling me that the storage capacity of the battery is too low and it must be replaced.
(Main internal battery 601).
I did a battery test 
I remind you that I only use my laptop in the sector. I never use it without the battery plugged in.

I would like to know if it is compulsory for the survival of my PC to buy a battery again and what will happen when its maximum charge capacity (which is currently at 16%) reaches 0%?
Thank you.

[Dragon-Fur]

@Hamaru 

At 2 1/2 years the battery is a candidate for replacement.

Battery test "601" indicates the battery is failing.

The battery must be replaced.

Open

 Maintenance and Service Guide

Parts / Procedure - Page 39

Description                                                                                                        Spare part number

Battery, 4 cell, 70 Wh, 4.55 Ah (includes Mylar and sponge)                917724-856

Battery, 4 cell, 52 Wh, 4.55 Ah (includes Mylar and sponge)                 L08855-856

Replacement and Purchase Options

HP Document:  HP Notebook PCs - Purchasing a Replacement Battery

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Good Reference

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HP Pavilion Gaming 15-cx0000 Laptop PC 

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