ok so i have a 2006 chevy colorado and im going to be getting a 270 amp singer alternator that comes with an overdrive pulley that adds 30-40 amps. and im pretty dead set on getting an xs battery for a secondary battery and i was wondering what size or model i should get. and i wanted to keep a battery with top posts under the hood and was wondering if i could go with like an optima yellow top under the hood or if i had another option for under the hood? ill be running a crescendo bc3500 on two fi bl 15s.

Xs power d3100

D3400 under the hood, D3100 as secondary.

Perfect ^

Edited March 17, 201312 yr by 16K