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High voltage battery charges a flat 12v battery??


Sonny1980
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Because lately I've only done a short drive once a week, I'm having the same issue again despite the warm temperatures. Although, this time it only takes a minute or so to get the car in Ready after depressing the brake pedal a couple of times, this has happened 3 times already within the last 4 weeks.

I have an OBD2 connector. If I use an app to check the Battery voltage, should I check it with the ignition totally off, pressing the start button once or twice (showing Ready)? And what's the minimum reading for the Battery to be OK?

I don't know how old the Battery is and I've seen that a similar Yuasa battery is quite expensive, almost £200, so I'm avoiding buying a new one unless I really have to...

Even if I get a new battery, in December I'll be away again for 2 weeks and a half and I'm worried I'll have the same issue again... Might be a good idea to get one of those jump starters, like NOCO?

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2 hours ago, Sonny1980 said:

Because lately I've only done a short drive once a week, I'm having the same issue again despite the warm temperatures. Although, this time it only takes a minute or so to get the car in Ready after depressing the brake pedal a couple of times, this has happened 3 times already within the last 4 weeks.

I have an OBD2 connector. If I use an app to check the battery voltage, should I check it with the ignition totally off, pressing the start button once or twice (showing Ready)? And what's the minimum reading for the battery to be OK?

I don't know how old the battery is and I've seen that a similar Yuasa battery is quite expensive, almost £200, so I'm avoiding buying a new one unless I really have to...

Even if I get a new battery, in December I'll be away again for 2 weeks and a half and I'm worried I'll have the same issue again... Might be a good idea to get one of those jump starters, like NOCO?

Perhaps you can buy a smart charger and connect it to the car 12v Battery once every month or so to keep your Battery recharged. Infrequent use always kills car batteries no matter size or type. If you buy a new Battery best way is to get original from Toyota dealer price is £165 cheapest from all other options. It is not good idea to change car battery size or type because the car inverter its designated to work with specific type and size battery and if you change that the battery might not get fully supported and does prematurely. If yours looks like this means it’s original and likely as old as the car is. 
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