Thank you everyone for very insightful comments. Mazda rep replied to my email and confirmed it was the EFB they're going to replace my battery with is Yuasa, but it costs a ridiculous 14,500. For that price, I am really tempted to go with other alternatives because at the end of the day, it's not like the Yuasa will last significantly longer than a Motolite.

I honestly don't use iStop anyway because I think it truly isn't built for Manila traffic jams. Other than motolite, are there any other brands that are more economical than the Yuasa? Somebody mentioned any type of EFB will be fine, right? Also, what is a trickle charger and how does it fit into the equation?