Not the answer to your question, but there was another discussion recently on replacement batteries (mid way down page) https://www.greenhybrid.com/forums/f...age-oil-31723/

 

I just replaced the original 12V Panasonic battery in the trunk of the TCH 2008. Bought the car 3 weeks ago, 82,000 miles. I tested the 12V Panasonic battery with a battery-tester and it reported that the SOC was 79% (12.4 Volts) and the SOH (long term health status) was 39%. Regarding the latter figure, this means that its probably better to replacee the 12V battery. Not a bad performance for an almost 11 year old car battery. The maintenance booklets do not report about battery change. As this battery is not for sale in Europe, its probably the original one installed in 2008. The replacement battery is an Optima Yellow Top 55AH (D34?) version. I used my motorcycle battery and some extra cables to ensure that 12V would remain available throughout the battery-replacement 'excercise'. I transferred the heatsensor from the Panasonic to the side of the new Yellow Top, using special type of heat transfering tape. Did not connect the vent tube because I did not find a hole on this Yellow Top to connect the hose to. Next weekend I wil replace the sparkplugs and airfilter and cabin airfilter. So far no issues. The car was imported from USA (I live in The Netherlands, Europe). I learned a lot from this forum and elsewhere on the internet/youtube regarding the reliability, diagnosis and maintenance of the HV battery. The TC has not been officially imported for over 15 years in Europe, so she is a rare item on the road here. This year Toyotat introduces the 2019 model in Europe.