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Originally posted by brianas I believe they only make 2 size battery groups
standard and compact
standard are 7dx7hx10w
Optima makes batteries in the following sizes: GRP. 75/35, GRP.34, GRP.31, and GRP.51. They are working on a GRP.24 right now. The standard size is the GRP.34.
My Optimas are the Group 34, P/N SC34A and are the red tops. Be sure to ask for the case adapters, the snap on and make up for the different dimensions for the 'battery' tray clamp
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