WH500 W745 Battery, Replacement Battery 84598-01 82742-01 204755-01 for Plantronics Savi W740 W440-M W440 W740-M W445 86507-01 Wireless Headset 3.7V 140mAh (1 Pack)

On time, quality seems as good as original, works great.

It lasts my entire 8 hour shift!!

Was concerned by all the different versions of batteries for my Plantronics computer phone but found the right fit-pretty pricey for a little battery but I needed one

So far it is working well. Note that it doesn’t have an on/off switch like OEM battery but that hasn’t been an issue - I put the headset back in the charging cradle when not in use.

This was such a good purchase. The battery that actually came with the headset can barely make it through a (busy) 10 hour shift! And I’ve only had this one die once on me at the very last few minutes of my shift and it was the busiest night I’ve ever worked. So happy I bought this!

The replacement batteries are currently performing well. (Time will tell.) Better performance than the existing old ones--could be the years of use.

Highly recommend!

The OEM Plantronics battery I had, lasted for years. This one is till going, but will start running out of juice before an hour's conference call is over. So I've gotten about 16 months of useful service out of it, I guess that's all right for the price.