There are two issues to consider if you replace the factory 12 volt battery in a TCH. They are both related to the fact this battery is located in a non vented trunk, instead of under the hood like a conventional battery. You have to be concerned about hydrogen and oxygen gas being produced as the battery is charged and discharged. It could form an explosive mixture in the trunk, although that would be a very low probability.
However for that reason Toyota uses a special AGM type battery that produces very little to no gas, and has a vent tube that connects to the top back of the battery.
The only non OEM battery that I know about which is AGM and has the vent fitting is the OPTIMA® YELLOWTOP® DS46B24R
. It unfortunately is made for the Prius and is only 38 Amp-hours
in capacity compared to the Camry original of about 52 Amp-hours. So while it will work, it will not provide as long a reserve if you leave the vehicle sitting for weeks at a time.
If you are willing to give up the vent connection and go with a totally sealed battery, there there is the OPTIMA Batteries 8012-021 D34 Yellowtop
, and the OPTIMA Batteries 8016-103 D34M BLUETOP
. An Optima rep on another forum confirmed these are in fact identical in internal construction and performance. The only difference is that the Yellowtop has a better warranty, and the Bluetop has additional threaded connectors that would allow you to connect the new battery before you disconnect the old. This avoids the power down and resulting potential issues you may have when you change the battery. Both batteries are 55 Amp-hour and provide equivalent or a bit better capacity than the OEM.
Keep in mind that these AGM batteries including the Toyota OEM are damaged by excessive charging current. That may have been what has caused your problem, when it was recharged. Toyota says 5 amps is the maximum. Many commercial charges produce a lot more unless they are limited.