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'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.
My go to now is odyssey, though they are fairly pricy. If i dont have a choice, like when my battery literally [exploded](https://www.reddit.com/r/Justrolledintotheshop/comments/pqcbcm/i_sounded_like_a_shotgun/], i get optima.
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+%.
I swear by odyssey batteries in particular the pc1500st
I've installed the Odyssey Extreme battery in my Outback. These are AGM with 99% pure lead, not the alloy. Best battery I've come across.
With winter coming, I bought an odyssey extreme battery for my 2017. I’m not going to risk it.
I have one of these and its been perfect for 5 years with a 700watt sound system on a v8 truck.
my 2019 GolfR battery died recently. well, it wouldn't hold any capacity and had to be charged every few days. anyway, i had my warranty apppointment today at the dealer and stood outside for an hour. i was wondering why it took so long. the new battery is a 000.915.105.CB.DSP. hopefully the AGM battery will do better with mine too.
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