I just replaced my dead Zenipower OEM cells with Varta 1254 A3. So far the battery life is exactly as specified by Sony. We'll see if the Vartas can handle the charging regime.
It has been in there since 2016 and still works fine.
I've noticed the 20xx Energizer series seem to be made in Japan. Refreshing since they don't stink like the Ikea MIC ones.
I just ordered the energizer lithium fob battery, will see if it lasts longer than the regular energizer which in my case was 3 years
Adding my experience here for others that may stumble upon the thread. I was having really bad+inconsistent battery life with my left and then right buds, where they would die in less than hour. I replaced the both earbuds original batteries with the Varta CP1254 A3 battery and also did a hard reset.
It took a little over an hour to do and finally the battery life is decent again. I was able to run them for a good 3 hours on noise canceling with max quality settings and it's a night-and-day difference.
I didn't get long lasting power from "any brand name". Switching to Energizer or Panasonic did much better, like 2 years.
I've had some good luck with OEM Vw therye where either Varta or another OEM factory battery. 7 years on one...and also 3 years till 50%, lots of variables, to make a battery last or not last.
I just now successfully replaced the battery with a varta cp1254 a4 due to the right one going bad after a year of use, testing it for a few hours now and it worked!
I've been using the varta cp1254 a3 (60mAh) in my left earbud for about a month. The difference is very small (less than 10%). From full charge to low battery warning, varta 20%, zenipower 25+%.
Name brand but avoid ebay. I bought some energizers and panasonics from more than one (supposedly reputable) ebay seller a while back that didn't last more than a month or so.
Write your review
Help others - share your experience with this part.
Voted AGAINST engine oil RAVENOL on the rating page
The brake pads NIPPARTS got the first review!
The brake discs Hella got the first review!
The brake discs OEM Suzuki got the first review!
For tires OEM Toyota already 25 reviews.
For tires IRONMAN already 25 reviews.
For starter motor OEM Volkswagen already 25 reviews.
In the rating best ignition coil already 13 brands participate!
In the rating best fuel pump already 5 brands participate!
In the rating best turbocharger already 4 brands participate!
In the auto rating headlights for Volkswagen Golf already 5 brands participate!
In the auto rating brake pads for Mazda 5 already 10 brands participate!
In the auto rating brake pads for BMW M2 already 5 brands participate!
Voted AGAINST engine oil RED LINE on the rating page
Voted AGAINST engine oil PENNZOIL on the rating page
