Back in the day, Toyotas came with 'green' batteries...no name on them, not even Toyota. Just gree with a black top...
My Corolla GT-S came with a Panasonic. Now, I *LOVE* Panasonic stuff just like I love Toyotas...except for their TVs, Car Stereos....and their Car batteries.
About 6-7 months after I bought the Hachiroku (which was about 18 months for the car) a cell shorted and spewed battery acid all over the hood. I had to scrub the whole underside of the hood with Baking Soda, and sprayed some around the engine bay for good measure.
Now, in 1980, I bought a new CorollA SR-5 with one of those green batteries. In 1985 I got into the car one day...dead battery. I looked at the cells and there was about 1.5" of water in each cell. I filled them (from the tap...I was late for work) but no avail.
I went to work and got a ride home. I was going to roll the car down the slight incline to try to start it and just for laughs, I turned the key. It fired right up!!!!! No charger, no nothing but adding water 8 hours earlier! I said screw the battery and drove the car for another YEAR with the same battery, this time keeping an eye on the water level in the cells.
I parked the Scion Monday after work, and we had two good days, so I drove the Supra. Thursday morning I was running late and had to jump the Scion!
Today I drove out to where I bought the car (50 miles) to pick up my reg and have it inspected. "Oh, by the way, I parked it 2 days and had to jump it. Can you check the charging system?"
Later on, he told me that the 1 year old Panasonic battery had...a bad cell!!!!
And, they didn't have a new one in stock...I have to go back next week...
WHY!!!! can't I buy a Green Battery?!?!?!?!
BTW, I later learned they were made by Yuasa, and there is not a good way to get one here in the US, unless it comes with a New Car...