I want my money back🥲🥲

battery life

by new to pace.... - 2024-07-03 18:43:21

I understand when one is 100% paced more battery is used.  That could be why your battery life has changed.

new to pace

Battery life

by piglet22 - 2024-07-04 04:35:38

Doesn't surprise me at all.

The discharge curve of lithium batteries has a long plateau and a sharp knee at end of life.

On the plateau, a small change can be multiplied up to look like a long time.

In digital systems, analogue signals are measured in steps which though small, can change suddenly.

It's also a characteristic of batteries that the measured voltage can drop after a high current event like a transmission and then recover.

This could easily be processed up to years of lifetime 

The long and short of it is that predicting battery lifetime is an imprecise science.

I know from personal experience that a battery can fail in situ despite frequent checks.

Percentage pacing is rarely the cause of shortened battery life...

by crustyg - 2024-07-04 04:38:00

..as battery life is total charge in battery divided by charge taken for each activation.

What am I talking about?  The real controller of battery life is pacing Voltage * pacing pulse width.  Out of the box, this PM uses a 0.4ms pulse width and usually 2.0V as the lowest setting.  Mine was single lead (RA) pacing, 100% of the time for 5years and was following the predicted lifetime until some very long Zoom (wireless) diagnostic sessions which chew through the battery.

So if your Accolade is pacing both leads at 3.5V 0.8ms it's not going to last the expected (hoped for?) 15years.  But 2.0V at 0.4ms would probably make 15-16years on a single lead (as mine was).

Let me be clear: 10% pacing *will* use less battery than 100% pacing, but not many folk with an Accolade are likely to be pacing that infrequently.

Hope that helps.

Battery Life

by doublehorn48 - 2024-07-04 11:30:44

I can see that this isn't your first rodeo. Your latest interrogation showed 11.5 years. From where I'm standing that's great. I've never had a pm that lasted more than 10 years. I got my latest one yesterday and I would have made 10 years if one of my leads haddn't gone bad.

 Have a great day

m.scott

Actually my third rodeo

by zawodniak2 - 2024-07-04 20:51:48

The first two were Medtronic  and they worked like a charm. 

first lasted 71/2 yr

second lasted 91/2 yr

       Rodger

settings?

by Tracey_E - 2024-07-05 10:03:33

Did they change any settings? Estimated life will be based on the current settings, so changing a setting can cause a sudden change in battery life. 

I'm on #5 which will need replaced later this year after 9 years. Before this, I've never had one last longer than 7 so I'm thrilled with 9.