EBL 2 Pack 65358-01 Repalcement Battery for Plantronics CS-50 CS-55

This is a quick review after receiving and installing, will try to update later once I have a better feel for long-term battery life.The battery was slightly bulkier than the original and has slightly longer and thicker wires, so it was a little more of a challenge of stuffing it into the compartment on my CS510 headset rather than it simply sliding in - it went in easily enough, but I ended up fiddling around for a minute getting it into place and getting the connector stuffed in beside it. When I popped the headset back onto the cradle it flashed for a moment to charging, but switched back to the steady green of "charged" within a minute.It passed the really basic test of not starting to beep as soon as I started a call with flying colors, which is more than I can say of the old battery.Update: After a week+ of using this daily for multi-hour conference calls, the battery I installed in my headset has showed no sign of running out of power.Downside: I discovered that the 3 high beeps I was getting were not in fact a battery warning but were instead the HL10 handset lifter's ring (really just "loud noise") detector detecting my loud voice since the phone is on a shelf beside me at head level. The final test was doing my own "Brrrring!" with the headset on to confirm that it's entirely possible I could have saved myself a few dollars.

Used in Head set for packet 8 phone - an upgrade in battery life, and you get two , how can you miss! ( good company I have charger and various size rechargeable cells- never had problems ) , ... a bit tricky to fit in, but it’s the nature of its tapered shape, got battery to fit with a little finagling

I had the original battery in service on my Savi W720 for almost 8-9 years now and recently the battery life went down to about an hour of talk time. I spend about 4-7 hours on conference calls each day and with this new battery I end up on either 50 or 75% capacity at the end of my day depending on how the day goes.I haven't tested the second battery, but I'm sure it's fine and I hope I won't need to use it for another 8 years! What a great value for the price paid!

great replacement, fast delivery, just as described

My Plantronics CS-50 was only lasting for about 30 minutes on a charge. I'm on conference calls all day sometimes so I was constantly having to switch over to crappy headphones while I waiting for another charge. I had no idea there was such a cheap and effective battery replacement option. I've been on a call for 8 hours and the headset is still running. I don't think this headset lasted more than 6 hours on the battery it came with when it was new.

It replace the original battery perfectly. Well worth the price for set of two.

Perfectly what I needed. Previously, I would have to leave the meeting due to the headset battery low power indicator beeping in my ear. With this battery I can easily power through all of my morning meetings and recharge over the lunch hour. Works perfectly for my application and as it was advertised.

These batteries do not seem to last the year. I'm already am onto the second battery in the pack of 2. Luckily it came with 2nd one or I would have no work headset. These are not built to last like the original battery which lasted years.