If the stock battery is 2SM, you'll be fine with a replacement 2SM. Practical advantage lang ng 3SM is the bigger reserve capacity and cranking Amps. Depending on actual use, the additional capacity may offer some insurance in starting the engine even if an accessory was left on overnight, for example, or if you run into an engine issue that requires you to crank it longer than usual.
It's up to you if you feel that the extra capacity is worth its weight (literally) in Pesos.
FWIW, I have a 3SM Amaron in my 2.5 Innova G.





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