Battery ODYSSEY or OEM Volvo

Didn’t even have to replace the battery in that time (11 years).

I have a 10 year old odyssey battery that's still going strong. Not cheap but worth it.

I bought the Odyssey battery and it's been well worth the money

I\u2019ve owned an S60 T8 for 2 and a half years now. Like others have said Volvo PHEVs deplete the battery first by default before touching the gas engine.

I have been driving a 2023 S60 Recharge for 2 years now. If someone told you it's bad to drive them with the battery depleted, they lied to you.

Odyssey makes the best. Optima for a middle end battery.

If willing to pay for a Optima yellow top, I suggest you get an Odyssey battery instead. It's a much better battery for about the same price.

my dishwasher has around 200 mile motorway range on a 64kWh net battery, which'll get me from Oxford to Darlington on a single charge, I could get to Newcastle if I camp behind a truck for most of it. My car is also stupidly inefficient for an EV, better EVs like a ID.3 or Megane could go further with smaller batteries.

That battery is absolutely cooked, sounds like the cells have sulfated to hell or there's internal damage from deep cycling

The fact that it's only taking 72-94Wh when it should be 600Wh is screaming dead cells, and that voltage drop from 12.8 to 4v in 2 hours is not normal even with parasitic draw

The battery is trash - if it was at 4v, the cells are either internally buckled/shorted - or the AGM is damaged and thus will not hold any charge (no capacity).